CannonKeys Brutal v2 1800 Layout Macro Additions (#20549)

* add matrix_diagram.md

* info.json: apply friendly formatting

* refactor default and via keymaps

- use four-space indent
- grid-align keycodes

* info.json: correct key positioning

Move the arrow keys down by 0.25u.

* add LAYOUT_ansi_rwkl_split_bs

* add LAYOUT_ansi_rwkl

* add LAYOUT_ansi_wkl_split_bs

* add LAYOUT_ansi_wkl

* add LAYOUT_iso_rwkl_split_bs

* add LAYOUT_iso_rwkl

* add LAYOUT_iso_wkl_split_bs

* add LAYOUT_iso_wkl