- Set all other ChibiOS defaults to 'off', when not targeting Proton-C
- Modified all existing F303 boards to point at the QMK_PROTON_C to ensure repeatable binary output
- Modified version.h generation so that SKIP_VERSION=yes generates the same output
* adds proton c base
* fixes custom matrix include
* adds readme.md
* initial proton coversion, no pin mapping
* start of mcu selection
* add pin mapping and sweet16 test
* add at90 to list
* disable backlight, fix d7
* update flag names
* doc updates
* proton c update for mcu selection