Update Documentation for schema 1.2 (#2429)

* Remove old and unused PR template

* Remove old spelling action which was replaced by .github/workflows/spelling2.yml

* Remove disabled fabricbot jobs

* Remove reference to schema which has been moved to pkgs

* Update references to current milestones

* Remove block comment in release roadmap

* Update to VS2022 per the Visual Studio downloads page

* Docs updates

* Remove Version reference from Visual Studio

* Fix linter auto-updates to Table of contents

* Apply suggestions from code review

Co-authored-by: JohnMcPMS <[email protected]>

* Restore workflow file

* Fix incorrect descriptions

Co-authored-by: JohnMcPMS <[email protected]>