Add mesh topology visualizer

[dhruvsandhal815-sudo]

Summary

• Added a Python mesh topology visualizer.
• Added Serial/USB telemetry parsing using pyserial.
• Added NetworkX graph visualization with RSSI-based edge colors.
• Added test telemetry mode for validating the visualizer.
• Added requirements.txt for required Python dependencies.

Testing

• Python syntax check passed.
• Required Python libraries installed successfully.
• Test telemetry processed successfully with 3 nodes and 3 connections.
• Added Serial monitoring support at configurable baud rate.

Fixes #18

[dhruvsandhal815-sudo]

Implemented the mesh topology visualizer as requested in issue #18. The PR includes Serial/USB telemetry parsing, RSSI-based topology visualization, test mode, and required dependencies.

[dhruvsandhal815-sudo]

Hi, PR #67 is ready for review. It implements issue #18 and has no merge conflicts. Please review and merge when possible. Thank you!

[dhruvsandhal815-sudo]

Hi, the hackathon submission deadline is today. PR #67 implements issue #18 and is ready for review. Could you please review and merge it if everything is okay? Thank you.

[dhruvsandhal815-sudo]

Hi, I noticed the PR was closed. I would like to continue with this contribution. Could you please let me know if any changes are required in the implementation? I can make the necessary updates and resubmit it for review. Thank you.