Cable Car Designs Cypher rev6 Layout Additions and Touch-Up (#20518)

* add matrix_diagram.md

* refactor default keymap

- use four-space indent
- grid-align keycodes
- use QMK-native keycode alias for `RGB_MODE_RGBTEST`

* refactor default_iso keymap

- use four-space indent
- grid-align keycodes

* refactor via keymap

- use four-space indent
- grid-align keycodes
- use QMK-native keycode alias for `KC_TRNS`

* info.json: apply friendly formatting

* add maintainer and url keys to info.json

* add LAYOUT_ansi with reference keymap

* add LAYOUT_iso; refactor default_iso keymap

* standardize default and via keymaps

- use `QK_GESC` at top left
- use `KC_DEL` for right half of Split Backspace
- use `KC_NUHS` for Non-US Hash position
- use `KC_NUBS` for Non-Us Backslash position
- use `KC_RGUI` for middle right mod

* add RGB Underglow keycodes to all keymap Function layers

1 files changed, 1 insertions, 0 deletions

diff --git a/keyboards/cablecardesigns/cypher/rev6/keymaps/default_ansi/readme.md b/keyboards/cablecardesigns/cypher/rev6/keymaps/default_ansi/readme.md
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+# The default ANSI keymap for Cypher