Adds IS31FL3731 RGB Matrix Implementation (#2910)
* adds is31fl3731 rgb matrix implementation
* fix build script for force pushes
* allow bootloader size to be overwritten
* adds planck light implementation
* split led config into 2 arrays
* idk
* betterize register handling
* update planck implementation
* update planck
* refine rgb interface
* cleanup names, rgb matrix
* start documentation
* finish up docs
* add effects list
* clean-up merge
* add RGB_MATRIX_SKIP_FRAMES
* add support for at90usb1286 to bootloader options
14b7602a65