Enhances device identification by adding MAC address normalization and comprehensive documentation.
- Add `MAC-ADDRESS-MAPPING.md` guide explaining device identification and troubleshooting.
- Implement `normalizeMAC` in `DataStore` to handle various MAC formats (case-insensitive, with/without separators).
- Export `EnrichDeviceInfo` in UPnP discovery to allow better integration and testing.
- Update `TROUBLESHOOTING.md` with a new section on device identification issues.
- Add comprehensive integration and diagnostic tests for MAC mapping, case sensitivity, and UPnP discovery.
- Update documentation structure (`README.md`, `SUMMARY.md`) to include the new mapping guide.