refactor(ahk): remove derive-ahk and references

This commit finally sunsets the derive-ahk proc macro and the
ahk-library cli command.

There is now a dedicated, stripped down komorebi.ahk example on the docs
website which mirrors the contents and style of the sample whkdrc:
https://lgug2z.github.io/komorebi/common-workflows/autohotkey.html

Cargo.toml

@@ -2,7 +2,6 @@
 
 resolver = "2"
 members = [
-    "derive-ahk",
     "komorebi",
     "komorebi-client",
     "komorebi-core",