replacing MAVLink with ROS2 + PX4

[aborjigin]

#4

[Copilot]

Pull request overview

This PR replaces MAVLink-based telemetry/signaling with ROS 2 messaging to integrate with a ROS2 + PX4 pipeline (per Issue #4), publishing detections as ROS messages and receiving control signals via a ROS topic.

Changes:

• Removed MAVLink UDP telemetry + STATUSTEXT signal handling from telemetry.py.
• Added ROS 2 node lifecycle management (init/shutdown), a /vision/signal subscriber, and a /vision/detections publisher.
• Wired ROS 2 init/shutdown into the main program lifecycle in main.py.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
telemetry.py	Replaces MAVLink transport with ROS 2 pub/sub for detections and signals; adds ROS node lifecycle helpers.
main.py	Initializes and shuts down the ROS 2 telemetry layer during program startup/exit.

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[ehjucsc]

lgtm!!