/claim #35898Resolves#35898
### Summary of key changes:
1. Add file name search/Go to file functionality to repo button row.
2. Add backend functionality to delete directory
3. Add context menu for directories with functionality to copy path & delete a directory
4. Move Add/Upload file dropdown to right for parity with Github UI
5. Add tree view to the edit/upload UI
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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Resolve#29328
This pull request introduces a file tree on the left side when reviewing
files of a repository.
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Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
