Add save_file and restore_file_from_disk agent tools (#44789)

Release Notes:

- Added `save_file` and `restore_file_from_disk` tools to the agent,
allowing it to resolve dirty buffer conflicts when editing files. When
the agent encounters a file with unsaved changes, it will now ask
whether you want to keep or discard those changes before proceeding.
5987dff7e4Nathan Sobo committed on 12/15/2025, 10:15:09 PM· committed by GitHubparenteceece8
5 files changedLine totals unavailable