This packages up my keyboard firmware used for the Keychron K6 Pro.
We add a custom keymap to the `keyboards/keychron/k6_pro/ansi/rgb/
keymaps` directory, a copy from the `default` one (with a modified
`keymap.c`), and then build that as a makefile target.
`via` is *disabled*, as their keybindings take priority over keymap.c.
Luckily, only `qmk` seems to be sufficient to build it.
A simple `:flash` target/script is provided as well, it relies on some
udev rules set in the global system
(`hardware.keyboard.qmk.enable = true`).
Change-Id: I9f7a7a992e13516c32033127f94e37aec62d6b67
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10020
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
