WIP: Draft: Ghcide blog post

This is a draft.

Open tasks:

• Add short "How to use" section (VSCode, all dependencies in place).
  • Reference to the wiki for full description.
• Be clearer on:
  • Why after many years it's now possible to use an IDE on GHC -- hie-bios based tooling
  • What the special configuration looks like -- so people with other complicated internal build systems can get an idea.
• Better showcase. Youtube video?
  • Wait till all performance related PRs are merged
• Section(s) on Improvements that myself (@mpickering) and Pepe made to ghcide to make the performance acceptable.
• Grammar & spell checking (with grammarly or language tool)
• Final "read through"