* Initial work on adding Sinc Rev. 3
* Add RGB Matrix support
* Add encoder map support
* Set I2C pins
* Update LED locations for right half
* Move USB definitions to info.json
* Update RGB modes
* Replace pin mappings for right half with correct ones
* Move config.h back to rev1/rev2 due to addition of rev3
* Convert initial Rev. 3 config work to be data-driven
* Convert RGB Matrix config to DD format
* More config cleanup
* Use full-duplex PIO
* Add MCU/bootloader settings for Rev. 2
* Change ISO Enter location since it shares location with Backslash
* Adjust build settings to reduce flash/EEPROM usage
