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* skjoldr.h: use ___ for KC_NO * skjoldr.h: use K<row><column> notation Matrix was previously defined using identifiers in the format of K<column><row>. * skjoldr.h: add matrix diagram * info.json: apply friendly formatting - key legends as labels - correct key sizes and positioning * refactor keymaps Refactors the `default` and `via` keymaps. - use QMK-native keycode aliases - grid-align keycodes for readability * rename LAYOUT macro to LAYOUT_60_ansi_arrow * enable Community Layout support * info.json: correct maintainer value Field is meant to reference the maintainer's GitHub username.