v0.1.8-beta2: Major DALI address support improvements

🔧 Major Fixes:
- Fixed device 0 group assignment off-by-one error
- Fixed group member IDs to show DALI addresses instead of internal IDs
- Services now accept DALI addresses (0-63) matching device names

✨ User Experience Improvements:
- Group members now display as [0,1,4,7...] matching device names [DALI#00,DALI#01,DALI#04...]
- Services use intuitive DALI addresses instead of confusing internal IDs
- Updated English and German translations for clarity
- Comprehensive README documentation updates

🛠 Technical Changes:
- Added proper range validation (0-63) for device IDs in all services
- Automatic conversion from DALI addresses to internal IDs for API calls
- Enhanced error handling for invalid DALI addresses
- Updated service schemas and documentation

This release resolves the major user experience issues with DALI group
management and makes the integration much more intuitive to use.