- add SENSOR_UNAVAILABLE return code constant
- CI changes only: also build for focal/noetic
- add TIMEOUT_REACHED
- add reserved constansts -3, 11 and 999
- Added array key/value list for extra data to CameraParam message and removed 'noise' field (will be provided in extra_data)
- add CAPACITY_EXCEEDED and CAPACITY_REACHED to ReturnCodeConstants
- Renamed CameraParams to CameraParam for consistency with internal message
- add CameraParam msg
- add KeyValue msg
- add INTERNAL_ERROR and IO_ERROR as constants to return codes
- improve constants description
- add ReturnCode with separate constants definitions
- add Trigger service using ReturnCode
- Initial release