BTT Slider button/feature

@Andreas_Hegenberg @GoldenChaos Can you implement a custom button that works just like the native brightness and volume buttons found on the touchbar? I know its possible to build it using objective c, as in this [https://github.com/billziss-gh/EnergyBar](http://github project), the creator was able to implement something like it onto the touchbar

The closest thing you can get in BTT is this:
https://community.folivora.ai/t/touch-slide-buttons-for-brightness-volume/13757/10

(However there is currently a bug on T1 MacBook Pros which breaks the sliding)

thank you very much!