add touchpad support

[wallamide]

Type of Feature Request

• Enhancement to an existing rumcake feature
• New feature unrelated to existing rumcake features
• New driver for existing rumcake features
• Support for a new MCU

Description

the eskarp keyboard uses a rust based firmware with a touchpad driver that could be ported to rumcake with a little effort. i may try getting this working for a personal project but wanted to put this out there for others to try as well.

[Univa]

Thanks for the issue! Mouse/pointer support is planned, but details about the API have yet to be decided. I'll probably get around to this once I finish up with some refactoring.

[wallamide]

i have a tps-43, i'd be happy to help test stuff if my setup can support it. let me know if you need any help with testing or trying to document this feature.