Rename Refactoring

[tsmaeder]

@gorkem will produce a PR for implementing Rename with file level operations soon, we'll need to adapt our rename UI to use that operation analogous to #6748

[tsmaeder]

Update from a video conference session with @gorkem @tolusha @svor :

• @gorkem has moved a RenameProcessor to jdt.ls (from jdt.ui) and has code that uses this to produce a "new style" WorkspaceEdit
• @svor will take over that code, add additional rename processors to implement a custom command that can take the options we produce in the current refactoring UI and return a WorkspaceEdit
• The curent UI will take the workspace edit to show a preview
• We have code already that applies "old style" workspace edits, we need to extend that to be able the file level operations in new style edits
• @tsmaeder will split this task into subtask, so we can parallelize it

[tsmaeder]

• Implement Custom Rename Refactoring Command #9112 Implement Custom Rename Refactoring Command
• Port Rename Wizard to use WorkspaceEdit #9113 Port Rename Wizard to use WorkspaceEdit
• Extend ApplyWorkspaceEditAction to Support File Level Changes #9114 Extend ApplyWorkspaceEditAction to Support File Level Changes