* Create ghc-deprecation.md

* Mark 8.8.3 with *

Co-authored-by: Julian Ospald <hasufell@posteo.de>

* Add deprecation to index

And update description to match the github project one

* dont use bullet list for prose

* Move ghc support plan

* Rephrasing

* Tweak support docs (#2232)

* Include pepe suggestions

Co-Authored-By: @pepeiborra

* More precisions

Co-authored-by: Julian Ospald <hasufell@posteo.de>
Co-authored-by: Michael Peyton Jones <me@michaelpj.com>