A prior commit apparently deleted several mounting holes.
- restore mounting holes
- update to Kicad7
- fix DRC errors resulting from update
- update footprints to use new shaped pads
In unikbd library, add eco2 layer holes to the OSI mounting holes part.
Since the osi keyboard cutout is on the eco2 layer, this allows the
mounting holes to be exported along with the cutout for case design.
- fix various ERC and DRC errors resulting from upgrade
- list included nets in busses on schematic
- Modify Footprints with multiple options (therefore multiple sets of
pads) to used shaped pads and proper pad numbering to eliminate DRC
issues, and ensure proper behavior
