- use QMK 3-character notation
- use #pragma once include guard
- add license header

- grid-align keycodes
- use QMK-native keycode aliases for KC_NO and KC_TRNS
- remove empty functions
- add license header

Also formats info.json to be human-friendly.

Turns out LAYOUT is the same as LAYOUT_all.

- add license header
- use #pragma once include guard

- use list for keyboard data
- add flashing and bootloader instructions

- grid-align keycodes
- use QMK-native keycode aliases for KC_NO and KC_TRNS
- add license header

- remove Bootloader selection header comments
- unify Build Options comment block
- specify use of Bootmagic Full (preventing a conflict with PR 12172)

Update rules.mk to conform to QMK's template.