The struct now tracks both file holding status and latest file versions
for permission validation and update checks.

- Implement SHA1 hash calculation module with async support
- Add file status analysis for tracking moves, creates, and modifications
- Enhance local file management with relative path handling
- Update virtual file actions with improved tracking capabilities

- Implement format_path_str function to clean and normalize file paths -
Add LocalSheet struct for tracking local file metadata - Support CRUD
operations on local sheet mappings - Integrate path formatting into
local sheet operations

- cached_sheet.rs: Cached sheet data management
- local_sheet.rs: Local sheet mapping structure
- member_held.rs: Member file holding status tracking
- NOTE: These modules are still under development