Rename MeiliSearch to Meilisearch

Depends on meilisearch-ruby 0.30 where MeiliSearch was also renamed.
Used this shell command to automatically rename, and then used the git
diff to manually look through and make sure nothing was wrong:
find lib/ -type f -exec sed -i 's/MeiliSearch/Meilisearch/g' {} \;
(of course also ran it for spec/ and playground/ after making sure the
soft deprecation allowed all tests to pass).

Ran into issues with the regular `const_missing` + `const_get`
deprecation having issues with autoload-ed methods. Added a temporary
workaround just for the Rails module. With this workaround there may be
cases where users are not warned for using MeiliSearch, which should be
investigated.

Author: ellnix

README.md

@@ -98,7 +98,7 @@ gem 'meilisearch-rails'
 Create a new file `config/initializers/meilisearch.rb` to setup your `MEILISEARCH_HOST` and `MEILISEARCH_API_KEY`
 
 ```ruby
-MeiliSearch::Rails.configuration = {
+Meilisearch::Rails.configuration = {
   meilisearch_url: ENV.fetch('MEILISEARCH_HOST', 'http://localhost:7700'),
   meilisearch_api_key: ENV.fetch('MEILISEARCH_API_KEY', 'YourMeilisearchAPIKey')
 }
@@ -120,7 +120,7 @@ The following code will create a `Book` index and add search capabilities to you
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch do
     attribute :title, :author # only the attributes 'title', and 'author' will be sent to Meilisearch
@@ -154,7 +154,7 @@ Requests made to Meilisearch may timeout and retry. To adapt the behavior to
 your needs, you can change the parameters during configuration:
 
 ```ruby
-MeiliSearch::Rails.configuration = {
+Meilisearch::Rails.configuration = {
   meilisearch_url: 'YourMeilisearchUrl',
   meilisearch_api_key: 'YourMeilisearchAPIKey',
   timeout: 2,
@@ -172,7 +172,7 @@ You can configure the index settings by adding them inside the `meilisearch` blo
 
 ```ruby
 class Book < ApplicationRecord
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch do
     searchable_attributes [:title, :author, :publisher, :description]
@@ -235,7 +235,7 @@ Book.search('*', sort: ['title:asc'])
 Meilisearch supports searching multiple models at the same time (see [🔍 Custom search](#-custom-search) for search options):
 
 ```ruby
-multi_search_results = MeiliSearch::Rails.multi_search(
+multi_search_results = Meilisearch::Rails.multi_search(
   Book => { q: 'Harry' },
   Manga => { q: 'Attack' }
 )
@@ -295,7 +295,7 @@ This gem supports:
 Specify the `:pagination_backend` in the configuration file:
 
 ```ruby
-MeiliSearch::Rails.configuration = {
+Meilisearch::Rails.configuration = {
   meilisearch_url: 'YourMeilisearchUrl',
   meilisearch_api_key: 'YourMeilisearchAPIKey',
   pagination_backend: :kaminari # :will_paginate
@@ -344,7 +344,7 @@ Then in your model you must extend `Pagy::Meilisearch`:
 
 ```rb
 class Book < ApplicationRecord
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
   extend Pagy::Meilisearch
 
   meilisearch # ...
@@ -365,7 +365,7 @@ end
 <%== pagy_nav(@pagy) %>
 ```
 
-:warning: There is no need to set `pagination_backend` in the configuration block `MeiliSearch::Rails.configuration` for `pagy`.
+:warning: There is no need to set `pagination_backend` in the configuration block `Meilisearch::Rails.configuration` for `pagy`.
 
 Check [`ddnexus/pagy`](https://ddnexus.github.io/pagy/extras/meilisearch) for more information.
 
@@ -377,7 +377,7 @@ you have multiple ways to achieve this.
 By adding `active: false` in the configuration initializer:
 
 ```ruby
-MeiliSearch::Rails.configuration = {
+Meilisearch::Rails.configuration = {
   meilisearch_url: 'YourMeilisearchUrl',
   meilisearch_api_key: 'YourMeilisearchAPIKey',
   active: false
@@ -387,11 +387,11 @@ MeiliSearch::Rails.configuration = {
 Or you can disable programmatically:
 
 ```ruby
-MeiliSearch::Rails.deactivate! # all the following HTTP calls will be dismissed.
+Meilisearch::Rails.deactivate! # all the following HTTP calls will be dismissed.
 
 # or you can pass a block to it:
 
-MeiliSearch::Rails.deactivate! do
+Meilisearch::Rails.deactivate! do
   # every Meilisearch call here will be dismissed, no error will be raised.
   # after the block, Meilisearch state will be active. 
 end
@@ -400,7 +400,7 @@ end
 You can also activate if you deactivated earlier:
 
 ```ruby
-MeiliSearch::Rails.activate!
+Meilisearch::Rails.activate!
 ```
 
 :warning: These calls are persistent, so prefer to use the method with the block. This way, you will not forget to activate it afterward.
@@ -411,7 +411,7 @@ By default, the **index_uid** will be the class name, e.g. `Book`. You can custo
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch index_uid: 'MyCustomUID'
 end
@@ -422,7 +422,7 @@ end
 You can suffix the index UID with the current Rails environment by setting it globally:
 
 ```ruby
-MeiliSearch::Rails.configuration = {
+Meilisearch::Rails.configuration = {
   meilisearch_url: 'YourMeilisearchUrl',
   meilisearch_api_key: 'YourMeilisearchAPIKey',
   per_environment: true
@@ -441,7 +441,7 @@ You can add a custom attribute by using the `add_attribute` option or by using a
 
 ```ruby
 class Author < ApplicationRecord
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch do
     attribute :first_name, :last_name
@@ -473,7 +473,7 @@ Note that the primary key must return a **unique value** otherwise your data cou
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch primary_key: :isbn # isbn is a column in your table definition.
 end
@@ -484,7 +484,7 @@ will be used as the reference to the document when Meilisearch needs it.
 
 ```rb
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch primary_key: :my_custom_ms_id
 
@@ -503,7 +503,7 @@ As soon as you use those constraints, `add_documents` and `delete_documents` cal
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch if: :published?, unless: :premium?
 
@@ -526,7 +526,7 @@ You can index a record in several indexes using the `add_index` option:
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   PUBLIC_INDEX_UID = 'Books'
   SECURED_INDEX_UID = 'PrivateBooks'
@@ -555,7 +555,7 @@ You may want to share an index between several models. You'll need to ensure you
 
 ```ruby
 class Cat < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch index_uid: 'Animals', primary_key: :ms_id
 
@@ -567,7 +567,7 @@ class Cat < ActiveRecord::Base
 end
 
 class Dog < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch index_uid: 'Animals', primary_key: :ms_id
 
@@ -585,7 +585,7 @@ You can configure the auto-indexing & auto-removal process to use a queue to per
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch enqueue: true # ActiveJob will be triggered using a `meilisearch` queue
 end
@@ -599,7 +599,7 @@ With **ActiveJob**:
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch enqueue: :trigger_job do
     attribute :title, :author, :description
@@ -629,7 +629,7 @@ With [**Sidekiq**](https://github.com/mperham/sidekiq):
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch enqueue: :trigger_sidekiq_job do
     attribute :title, :author, :description
@@ -659,7 +659,7 @@ With [**DelayedJob**](https://github.com/collectiveidea/delayed_job):
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch enqueue: :trigger_delayed_job do
     attribute :title, :author, :description
@@ -683,7 +683,7 @@ Extend a change to a related record.
 
 ```ruby
 class Author < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   has_many :books
   # If your association uses belongs_to
@@ -693,7 +693,7 @@ class Author < ActiveRecord::Base
 end
 
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   belongs_to :author
   after_touch :index!
@@ -712,7 +712,7 @@ With **Sequel**, you can use the `touch` plugin to propagate changes.
 ```ruby
 # app/models/author.rb
 class Author < Sequel::Model
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   one_to_many :books
 
@@ -734,7 +734,7 @@ end
 
 # app/models/book.rb
 class Book < Sequel::Model
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   many_to_one :author
   after_touch :index!
@@ -757,7 +757,7 @@ You can strip all HTML tags from your attributes with the `sanitize` option.
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch sanitize: true
 end
@@ -769,7 +769,7 @@ You can force the UTF-8 encoding of all your attributes using the `force_utf8_en
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch force_utf8_encoding: true
 end
@@ -781,7 +781,7 @@ You can eager load associations using `meilisearch_import` scope.
 
 ```ruby
 class Author < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   has_many :books
 
@@ -834,7 +834,7 @@ You can disable exceptions that could be raised while trying to reach Meilisearc
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   # Only raise exceptions in development environment.
   meilisearch raise_on_failure: Rails.env.development?
@@ -849,7 +849,7 @@ You can force indexing and removing to be synchronous by setting the following o
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch synchronous: true
 end
@@ -862,7 +862,7 @@ You can disable auto-indexing and auto-removing setting the following options:
 
 ```ruby
 class Book < ActiveRecord::Base
-  include MeiliSearch::Rails
+  include Meilisearch::Rails
 
   meilisearch auto_index: false, auto_remove: false
 end