feat: add PnP laser solving and update 0xA5 frame to 4-float protocol
- Integrate PnP rectangle pose estimation + laser world coordinate computation from scripts/calibrate/laser_pnp.py
- Publish normalized measurement (laser/RECT) and reference (rect center) via Float32MultiArray
- Update gimbal 0xA5 frame to 18-byte format: measure_x, ref_x, measure_y, ref_y
- Add camera calibration, laser line params, and RECT_L/W constants
- Add corner ordering (TL/BL/BR/TR), SOLVEPNP_IPPE, and pose/laser visualization overlay
- Remove standalone vision_example.py (superseded by ROS2 nodes)
- Add scripts/calibrate/ with calibration and PnP tools
dev01
fd3d6b7ab5