.gitignore: Add cabal.project.local and hie.yaml

`hie.yaml` is generated by [implicit-hie][1], part of the
[haskell-language-server][2] project.

[1]: https://github.com/Avi-D-coder/implicit-hie#readme
[2]: https://github.com/haskell/haskell-language-server

Author: hololeap

.gitignore

@@ -5,3 +5,5 @@ dist
 .env
 .anvil
 .ghc.environment.*
+cabal.project.local
+hie.yaml