Convert mode definitions from flat to nested JSON schema:
- Embed LED colors in mode settings (remove separate color mapping)
- Add behavior, manual_control, and led_color to top level
- Nest AL settings in al_config object for service validation
- Reduce from 11 to 8 essential modes (remove Reading, Homework, Play)
Modes now use nested structure to avoid AL service validation errors
while maintaining extensibility for different behavior types.
John Ogle
a5ed6c6340