Style filenames and paths in project diff buffer headers according to git status (#25653)

This substitutes for the icons that we previously kept in these headers.

cc @iamnbutler 

Release Notes:

- N/A
eeac1a9287Cole Miller committed on 2/26/2025, 7:43:10 PM· committed by GitHubparente83ebd1
1 file changedLine totals unavailable