Add support for willRenameFiles/willCreateFiles/willDeleteFiles

[zulus]

As in subject. LSP4E currently only support basic inline refactoring in editor, could also support RefactoringParticipant inside project explorer

[angelozerr]

IMHO LSP4E should implement this support because renaming a file is a commons usecase and without this support it can be a nightmare for user.

Imagine that you are coding a Java project and you want to rename a Java file. A lot of files must be updated. Without this willRenameFiles it is not possible.

Advanced ls like gopls, rust anayzer, jdt ls have this support which is working well in vscode but not in eclipse ide.

I am supporting this didRenameFiles for IntelliJ and I think you could use a lot of code that I have written like glob pattern (I have translated all test from vscode about glob pattern and all tests are working now)

If you are interested to use some part of my code and perhaps adapt it for eclipse api please ask me and I will give you some links

[angelozerr]

I forget to mention that I have too implemented didChangeFileWatcher which is too very important

[zulus]

I’ll update this patch in couple days. It was required to support lsp refactoring features