Cameron/camera enhance

[Luxaris]

@Cameron-Basara as discussed, the ROI selector and enhancer.

it adds a prototype ROI selector workflow for camera zooming. The following were my changes:

• Extend camera_enhancer to accept dynamic ROI updates from /camera/roi_select
• Add a new roi_selector node that lets the user drag-select a region in an OpenCV window
• It publsiehs selected ROIs using sensor_msgs/RegionOfInterest
• Keeps the existing hardcoded bottom-right zoom behavior as the fallback before any ROI is selected
• Adds reset behavior via an all-zero ROI message
• Registers roi_selector as a ros2 run rover_vision roi_selector entry point
• Ignores local test_files/ used for ad hoc camera/viewer scripts

[Luxaris]

The selector is intended as a prototype UI path, i think the long-term dashboard integration can publish the same RegionOfInterest messages without changing camera_enhancer. So it should be modularizable