Add hik_camera_ros2_driver (renamed from camera2_ws to fori_camera_ws)

Hikvision MV-CS016-10UC ROS2 driver used for the dual/triple camera rig:
hardware-triggered acquisition, per-camera exposure/gain/white-balance
params, and self-calibrating device-clock timestamping (anchored to the
shared LiDAR/GPS clock domain via /timeshare) to keep image timestamps
tightly synced across cameras during motion. Includes the vendored
Hikvision MVS SDK (hikSDK/) needed to build.

.gitignore

@@ -0,0 +1,8 @@
+# colcon build artifacts — regenerate with `colcon build`
+build/
+install/
+log/
+
+__pycache__/
+*.pyc
+.vscode/