When a file is deleted, the parent folder isn't colored which makes it
hard to know unless we look at the Git Panel.

This PR adds `Color::Deleted` to fix that.

<img width="366" height="428" alt="Screenshot 2026-03-14 at 7 56 04 PM"
src="https://github.com/user-attachments/assets/6ed3a3c7-e7e7-4b48-b89c-705a7c1ff634"
/>

Release Notes:

- Improved project panel to color folder with deleted file