Create control script for plex

[chicco-carone]

This pull request introduces a new script, plex_bridge.py, which acts as a bridge between Plex and Snapcast. The script connects to a Plex server, monitors the current playback status, and updates Snapcast accordingly. It also handles various control commands and properties updates for the Plex player.

The script can be added as a control script to a snapcast stream and it requires the plex server ip, token and player name to function properly.

This pr also partially solves this issue: #1165

If needed i can add some simple documentation on how to use it but I just wasn't sure where to put it

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[badaix]

Thanks, sounds very interesting!
Could you please add a description of how to setup Plex with Snapcast? The best place should be in player_setup.md.
I would really like to test it, but I've never used plex before.

[chicco-carone]

I added in that file the documentation to set up plexamp with and without control script. I've been using this method for about a year without issues (except the control script since I just made it) and it's working pretty reliably

[badaix]

Awesome, thanks :)
I will try it out ASAP (latest the upcoming weekend, I hope).