feat: Add support for Syncbot

[AshyHacker]

Hello, I've added support for Syncbot, a new powerful sex toy.

The encrypt key is hardcoded. You must use the correct encrypt key for the protocol to work properly.

The implementation was tested using intiface-engine.

[blackspherefollower]

I don't suppose you did any work to understand the touch slider readings?

[AshyHacker]

You're right. Syncbot also has Rx channel and can read battery level and slider, but this PR focuses on the core functionality. (This is just FYI question, right?)

[blackspherefollower]

Pretty much. Ideally I'd ask for the protocol to be documented (both directions) in an issue on https://github.com/buttplugio/docs.buttplug.io just so we at least have the notes recorded so it'll be quicker to add sensor support later

[AshyHacker]

Sounds good. I have summarized the findings from my analysis in an issue.

buttplugio/docs.buttplug.io#42

[blackspherefollower]

There's a couple of minor tweaks needed, but overall the fact you've worked out what the protocol is doing is a major achievement here.

I'll test with my hardware when I'm back home in a week.

[blackspherefollower]

So, I think this is in good shape (maybe run cargo fmt -- --emit=files for code formatting if you haven't already), but I'd like to test with my hardware before it lands.

Thanks for your hard work on this one

[blackspherefollower]

Hmm... Unfortunately mine isn't behaving with this implementation.
I'm going to compare some traces from mine to see how they compare.

[AshyHacker]

That's unfortunate... One possibility is that the encryption key is generated based on information specific to a particular device (such as the MAC address). I'll do a deeper analysis when I have time.