Support for renaming of Haskell modules

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.