[forgive] Add basic codelens provider (#32476)

Adds a first codelens provider for successfully compiled functions. A
later PR will add an actual command that will fire when the codelens is
clicked

![Screenshot 2025-02-25 at 6 40
20 PM](https://github.com/user-attachments/assets/924586e0-f70a-45d1-b0e6-a89af9371c8d)