docs: add getting started page for updated feature docs

docs/docusaurus.config.js

@@ -61,7 +61,7 @@ module.exports = {
     prism: {
       theme: lightCodeTheme,
       darkTheme: darkCodeTheme,
-      additionalLanguages: ['csharp', 'fsharp', 'diff'],
+      additionalLanguages: ['csharp', 'fsharp', 'diff', 'json', 'powershell'],
     },
   },
   presets: [

docs/preview/01-index.md

@@ -7,13 +7,24 @@ sidebar_position: 1
 ---
 
 # Introduction
-The Arcus Testing library provides test-friendly capabilities to kick-start your test suite. Ranges from tech-independent infrastructure code to fully production-ready assertions. The library contains also Azure-related test fixtures to make interactions during testing more maintainable, testable and fun to write.
+Welcome to the Arcus Testing site! 🎉
 
-## Guides
-* [Migrate from Testing Framework to Arcus.Testing v1.0](03-Guidance/migrate-from-testing-framework-to-arcus-testing-v1.0.mdx)
+## What is Arcus Testing?
+Arcus Testing is an umbrella term for a set of NuGet packages `Arcus.Testing.*` that help with the creation, maintenance, and defect localization of code testing.
 
-# License
+> 🎖️ Specifically designed to help with integration testing against Azure resources, but also helps with tech-independent infrastructure.
+
+In short: Arcus Testing is a set of libraries that make test more fun to write!
+
+## Why should I use Arcus Testing?
+Testing is a fact of life. Writing those tests often comes with an effort to set up a test code infrastructure to interact with all the parts of the system.
 
+Arcus Testing lessens the burden of re-creating the same boilerplate test code infrastructure for similar projects.
+
+## How to use Arcus Testing?
+See our dedicated [getting started](02-getting-started.md) page to take your first steps with Arcus Testing.
+
+# License
 This is licensed under The MIT License (MIT). Which means that you can use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the web application. But you always need to state that Codit is the original author of this web application.
 
 _[Full license here](https://github.com/arcus-azure/arcus.testing/blob/master/LICENSE)_