[codex] add Mac RDK camera streaming tools

[limit-coding]

What changed

• Added new_project/local_mission_vision.py, a Mac-side local runner that can read either a local camera or an HTTP MJPEG stream, scan QR first, then switch to YOLO classification/detection.
• Added new_project/rdk_deploy/mjpeg_view.py, a lightweight RDK-side ROS /image to MJPEG HTTP preview server.
• Documented Mac camera selection, RDK-to-Mac camera streaming, and Ethernet-based access commands in new_project/README.md.

Why

This supports debugging the RDK X5 USB camera from a Mac over Ethernet/Wi-Fi without changing the RDK static IP or radar network configuration. The Mac can preview the camera in a browser or run QR -> YOLO recognition from the stream.

Validation

• Verified the original local scripts with Python syntax checks during development.
• Verified SSH over the Mac Ethernet static IP setup to 192.168.1.100.
• Verified RDK /image recovered at about 30 Hz after restarting hobot_usb_cam.
• Verified http://192.168.1.100:8080/stream returns MJPEG/JPEG data.
• Verified Mac-side recognition can open http://192.168.1.100:8080/stream and read frames.

Notes

The local checkout had unrelated existing changes and one existing unpushed main commit, so this PR was built from a clean origin/main worktree and includes only the camera streaming/Mac runner files.