* add matrix_diagram.md
* info.json: apply friendly formatting
* add LAYOUT_66_ansi_split_space
* add LAYOUT_66_iso_split_space
* refactor default keymap
- use four-space indent
- use QMK-native keycode aliases directly
- use `enum` statement for layer names
- grid-align keycodes
* refactor ansi keymap
- use four-space indent
- use QMK-native keycode aliases directly
- use `enum` statement for layer names
- grid-align keycodes
* refactor iso keymap
- use four-space indent
- use QMK-native keycode aliases directly
- use `enum` statement for layer names
- grid-align keycodes
* change layout macro for ansi keymap
Refactors the `ansi` keymap to use the `LAYOUT_66_ansi_split_space` macro, and renames the keymap to `default_ansi_split_space`.
* change layout macro for iso keymap
Refactors the `iso` keymap to use the `LAYOUT_66_iso_split_space` macro, and renames the keymap to `default_iso_split_space`.
* add LAYOUT_66_ansi
The column for the spacebar key may be wrong; I was unable to find high-resolution images of the PCB.
* add LAYOUT_66_iso
The column for the spacebar key may be wrong; I was unable to find high-resolution images of the PCB.
* enable Community Layout support
