Support for renaming of Haskell modules

[VeryMilkyJoe]

When I rename a Haskell module, I want the IDE to:

• change the module declaration to the new name
• change all imports of that module to the new name
• edit the cabal file by changing the entry of that file to the new name

I will implement this in multiple PRs:

1. Add support for the new plugin options to listen to the notifications that we want to listen for (willRenameFile, didRenameFile, didDeleteFile).
2. On didRenameFile, change the cabal-file entry from the old module name to the new one.
3. On didRenameFile, change the module-declaration and imports of the renamed module from the old name to the new one.
4. On didDeleteFile delete the file from the diagnostics store .
5. On didRenameFile restart the shake session to get new diagnostics.

[VeryMilkyJoe]

I have implemented the draft for all of this already, and I will link the PRs to this issue!