Crkbd RGB Matrix config with WS2812

[r2d2rogers]

Add WS2812 driver RGB Matrix config for crkbd.

Description

Added RGB Matrix config to rev1/rev1.c to be available if you enable the RGB_MATRIX_ENABLE flag in the keymap config.h

Currently works as mirrored unless you flash two hex files.

For best results compile the second file with the Right and Left sections of g_rgb_leds swapped, to put the right hand on top for the hex you flash to the right hand side.

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[r2d2rogers]

This enables RGB matrix for a keymap if you add RGB_MATRIX_ENABLE = WS2812 to your rules.mk

Optionally you can add

#ifdef RGB_MATRIX_ENABLE
#define RGB_MATRIX_KEYPRESSES
#endif

to the keymap config.h for reactive animations.

[mechmerlin]

You're getting a few "firmware is too large issues"

[drashna]

@mechmerlin Those would mostly go away if somebody merged #5471 :)