* info.json: human-friendly formatting

- one key per line
- line breaks between physical rows
- four-space indent

* info.json: add data for LAYOUT_grid

* fix keymap paths

This commit corrects the paths for three keymaps that were in the wrong directory.

* refactor and bugfix abienz keymap

- remove extra commas
- use QMK-native aliases for KC_TRNS and KC_NO
- add include for Colemak keycode support
- use four-space indent

* refactor and bugfix michelle keymap

- remove inline comments for keymap layout
- remove extra commas
- use QMK-native aliases for KC_TRNS and KC_NO
- use four-space indent

* refactor and bugfix twolayer keymap

- remove extra commas
- refactor action_get_macro() keycode to QMK-native keycode
- use QMK-native aliases for KC_TRNS
- use four-space indent
- adjust grid alignment

* rename LAYOUT_grid to LAYOUT_ortho_5x15

* refactor config.h file

- use #pragma once include guard
- update MANUFACTURER and PRODUCT strings to be consistent with other OLKB boards
- remove Magic config (all settings are default)

* refactor atomic.c

- add license header
- use GPIO control functions

* refactor atomic.h

- add license header
- use #pragma once include guard
- remove redundant file includes

* refactor rules.mk

- remove Bootloader selection comments
- unify Build Option header comment to QMK template
- unify Build Option rules and inline comments

* alias LAYOUT_grid to LAYOUT_ortho_5x15