refactor(sample-change): improve sample change tango device, action server & gripper control
- Added/improved sample change functionality (device, action server)
- Moved set_system_parameters up to ROS level
- Introduced pytest tests
- Refactored gripper controller & QR detector, removed unused utilities
- Added a JSON file for system parameters (positions/workflows)
- Added a SampleMagazine class
- Improved gripper control and fixed sync issue
- Added magazine scan feedback