* Refactor keymaps
- use QMK-native keycode aliases
- grid-align keycodes
[refactor]
* Correct key sequence
Moves the keycode representing the right half of a split Backspace to
the number row, after the left half/2u Backspace keycode.
Updates the keycode grid alignment to maintain readability.
[bugfix]
1f8f0f70a2