Pearl Boards Atlas Layout Additions (qmk#20918)

* add matrix_diagram.md

* info.json: apply friendly formatting

* info.json: correct layout data

Moves the position representing the Rotary Encoder to the top of the layout.

* refactor keymaps

Applies the following changes to the `default` and `via` keymaps:

- four-space indent
- use of QMK-native keycode aliases
- numerically-indexed keymap layers
- updated grid alignment of keycodes

* add LAYOUT_ansi_blocker_tsangan_wkl_split_bs

* add LAYOUT_ansi_blocker_tsangan_wkl

* add LAYOUT_iso_blocker_tsangan_wkl_split_bs

* add LAYOUT_iso_blocker_tsangan_wkl