revert Enhance FileInfo structure and DiskFS functionality
- Added CTime (creation time) and AccessCount fields to FileInfo struct for better file metadata tracking.
- Updated NewFileInfo and NewFileInfoFromOS functions to initialize new fields.
- Enhanced DiskFS to maintain access counts and file metadata, including flushing to JSON files.
- Modified Open and Create methods to increment access counts and set creation times appropriately.
- Updated garbage collection logic to utilize real access counts for files.
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