### What problem does this PR solve?
feat: Implement file-related functionality
- Implement file deletion API and business logic
- Add context support for file deletion operations and prevent root
folder deletion
- Implement file move functionality
- Add File Download API Endpoints and Utility Functions
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
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Co-authored-by: Yingfeng <yingfeng.zhang@gmail.com>
