Removed the combined .dtsi file for each group of common layouts, and
split the position map across the files in each group. This makes
reading the position maps slightly more difficult, but it aligns the
common layouts with the keyboard-specific ones such as
foostan/corne.dtsi in that simply including each header adds the
layout, with no need to set status = "okay".
Adds support for the CKP family of boards
BT60V2 ANSIHotswap, ISO Hotswap, ANSI Lowpro and soldered
BT65 ANSI Hotswap, ISO Hotswap and soldered
BT75 ANSI Hotswap and soldered
The BT65 and BT75 are stylised as btXX_v1 in order to maintain compatibility with customers existing zmk-config setups in the same way the BT60 V1 was handled when merged into main.
CKP boards have identical pinmapping between hotswap and soldered so there's only one set of defconfig, dts, keymap, yaml and yml files per size