project_panel: Show error when file or directory already exists while renaming or creating new one (#28177)

Closes #14425

<img width="289" alt="image"
src="https://github.com/user-attachments/assets/2994c401-23e3-419a-90fc-1a83959fdf21"
/>

Release Notes:

- Improved the project panel to show an error when a file or directory
already exists while renaming or creating a new one.
d6d9c383cbSmit Barmase committed on 4/7/2025, 2:44:22 AM· committed by GitHubparent8cfb9be
2 files changedLine totals unavailable