workspaceEdit missing changeAnnotations

Hello,

I'm facing an issue where the `rename` capability is broken because the issue reported here:
https://github.com/neovim/neovim/issues/34731

It seems problem has to do with the fact that when `rename` generates a workspaceEdit, it returns AnnotatedTextEdits but without a changeAnnotations field. So a client trying to use the annotation IDs will break.

[This is a good description of the issue.
](https://github.com/neovim/neovim/issues/34731#issuecomment-3029046310)

Start by tracing the rename capability's workspaceEdit generation and the handling of AnnotatedTextEdits. Use the linked Neovim issue and its referenced description to understand how clients consume annotation IDs. Done means rename returns a workspaceEdit with the required changeAnnotations data so clients can use those IDs without breaking.

Written by the indexing model from the issue text.