fix(cabal): cabal-fmt and cabal-gild discover module

[ncaq]

cabal-fmt and cabal-gild can discover module and autocomplete.

-- cabal-gild: discover ./src
exposed-modules:

The current system, treefmt can't detect change haskell module. I write to depend to haskell module file.

[ncaq]

Maybe I mistake. cabal-gild it's don't work.

[ncaq]

I tested my product and cabal-gild. My way code, correct way in this project?