Fix joining thread on serial disconnect

[1Blademaster]

No description provided.

[Copilot]

Pull Request Overview

This PR refactors the thread joining logic in the stopAllThreads method to avoid potential deadlocks by ensuring threads don't try to join themselves. The change replaces individual thread join calls with a loop that checks if each thread exists, is alive, and is not the current thread before attempting to join it.

Key Changes:

• Replaced multiple individual thread.join() calls with a single loop
• Added current thread detection to prevent self-joining
• Added null and alive checks for thread safety

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[NexInfinite]

if thread is not None and thread.is_alive() and thread is not this_thread: I love how easy python is to read compared to JS, I miss python PRs. Codes good tho 👍🏻