feat: Enhance metadata extraction and formatting, improve extractor architecture, and update documentation

ToDo.md

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+Project: Media File Renamer and Metadata Editor (Python TUI with Textual)
+
+TODO Steps:
+1. ✅ Set up Python project structure with UV package manager
+2. ✅ Install dependencies: textual, mutagen, pymediainfo, python-magic, pathlib for file handling
+3. ✅ Implement recursive directory scanning for video files (*.mkv, *.avi, *.mov, *.mp4, *.wmv, *.flv, *.webm, etc.)
+4. ✅ Detect real media container type using mutagen and python-magic
+5. ✅ Create Textual TUI application with split layout (left: file tree, right: file details)
+6. ✅ Implement file tree display with navigation (keyboard arrows, mouse support)
+7. ✅ Add bottom command bar with 'quit', 'open directory', 'scan' commands
+8. ✅ Display file details on right side: file size, extension from filename, extension from metadata, file date
+9. ✅ Add functionality to select files in the tree and update right panel
+10. ✅ Implement detailed metadata display including video/audio/subtitle tracks with colors
+11. ✅ Add custom tree styling with file icons and colored guides
+12. ✅ Add scrollable details panel
+13. ✅ Handle markup escaping for file names with brackets
+14. Implement metadata editing capabilities (future steps)
+15. Implement file renaming functionality (future steps)