Modify castellated 1x12 to larger diameter plated castellated holes. Panelize with route-out around castellated edges. Scoot Qwiic connector in to use that side of the board as the tab.
"Castellated" library '1x12CASTELLATED' and 'PRO_MICRO_C' footprints updated and 'PRO_MICRO_C' device updated.
Pro Micro C got uniform drill/ring sizing + added plated holes to outside in place of drills
Frank got 1U Keycap standard switch spacing and updated Pro Micro footprint.