BLE support (Windows to Linux only)

[DragRedSim]

Hi there, I found this tool and wanted to use it to synchronise my dual-booting Legion Go (a device similar to a Steam Deck). Most of my devices turned out to be BLE, and so I implemented support for BLE synchronisation. Note that it is currently set up to only work one way, from Windows to Linux, as this was my target use case, and I didn't want to potentially break Windows by writing back to it from Linux. I've built it so that it will attempt to detect which device matches up (by name), but you will have to pair in both Linux and then Windows, and then run the script in Linux. I've tested my changes, and it's in a "works-for-me" status, but I can't guarantee all situations.

[KeyofBlueS]

Hey! Thanks so much for the PR! Really appreciate you taking the time to add BLE support, super cool stuff.

That said, I don't currently have any BLE devices on hand, so I'm not able to test the changes properly. That's actually why BLE support has been kind of on pause up to now.

I'll leave the PR open for the time being, but I'll need to hold off on merging until I get a chance to test it properly. Thanks again for contributing, really appreciate it!