Part of https://github.com/zed-industries/zed/issues/33715


https://github.com/user-attachments/assets/d2d6f47d-3974-4c8c-aab9-9046891186bf

Unlike VSCode that does more advanced hovering, this one only works for
inlays with tooltip LSP data in them.

Release Notes:

- Started to show inlay label parts' tooltips when they are hovered

Co-authored-by: Lukas Wirth <lukas@zed.dev>