Initial files for search update/fix

Will set this up soon. See #192 and #162.

Author: philwareham

package.json

@@ -17,7 +17,8 @@
   },
   "dependencies": {
     "jquery": "3.5.1",
-    "lunr": "2.3.9"
+    "lunr": "2.3.9",
+    "simple-jekyll-search": "1.10.0"
   },
   "license": "GPL-2.0"
 }

search.json

@@ -0,0 +1,14 @@
+---
+layout: none
+---
+[
+  {% for post in site.posts %}
+    {
+      "title"    : "{{ post.title | escape }}",
+      "category" : "{{ post.category }}",
+      "tags"     : "{{ post.tags | join: ', ' }}",
+      "url"      : "{{ site.baseurl }}{{ post.url }}",
+      "date"     : "{{ post.date }}"
+    } {% unless forloop.last %},{% endunless %}
+  {% endfor %}
+]