* Migrated files to KiCad 7
* Added RTC
* IC: Analog Devices Inc. DS3231MZ
* Battery holder (CR1616): Keystone Electronics 3012
* Cleaned up traces
* Changed ground fill to solid
* Removed test pads and LCD solder jumper
* Cleaned up/prettified silkscreen and logo
* Cleaned up some footprints (more to come eventually)
* Added 3D models for board display
* Schematic image is now a PDF since it has 2 pages
