Since docs are now generated alongside builds and hosted on the app server there is no longer a barrier to using docusaurus docs as the main documentation presentation. Any user looking for docs can use the GH Pages hosted site or a "versioned" docs site hosted on their MS app. Due to this we can fully commit to docusaurus and take advantage of MDX layouts to simplify docs.
* Replace env/file configs headings in configuration with MDX tabs to make reading easier
* Remove superfluous TOCs
* Replace internal links in repo readme with links to docsite
