Is your feature request related to a problem? Please describe.
Allow to rename files or folders through the LSP server.

Describe the solution you'd like
Implement workspace/willRenameFiles

Describe alternatives you've considered
Manually renaming?

Additional context
This would likely have to be implemented through a LSP-specific "Rename File/Folder" command and wouldn't be supported when triggering other rename commands (built-in or FileManager ones). Unless we would hook those maybe but it would have to be investigated if that's feasible.

There is also workspace/willDeleteFiles and workspace/willCreateFiles but that could be a separate feature request.