Add comprehensive bitrate data extraction and visualization capabilities:
- Implement analyze_files command for file candidacy detection
- Add extract_bitrate_data command using ffprobe
- Create BitrateData, BitrateFrame, File, and FileCandidacy types with TS bindings
- Update App to fetch and display bitrate data from dropped files
- Refactor DropOverlay to use new file analysis system
- Configure Graph component for packet size visualization
- Simplify drag-drop flow to trigger on drop event only
