- Close https://github.com/enso-org/cloud-v2/issues/856
- Implement upload for existing files
- This is triggered by uploading a file with the same name.
- Add a modal that allows the user to select whether to rename or update the file, for each conflicting file
# Important Notes
- There are a *lot* of buttons in the modal. Any ideas on how to make this screen clearer/simpler/easier to understand would be greatly appreciated.
- There are currently a few minor backend issues preventing all functionality from fully working:
- Projects currently cannot be updated due to a bug
- Neither files nor projects can be uploaded if their name contains `()` - e.g. `foo (2).txt`
