Compiling firmware with QMK MSYS

Install QMK MSYS
Setup QMK MSYS
Clone this project into qmk_firmware/keyboards/minecatr *this means this repositories contents go in here
Copy the build folder of the desired keyboard into the QMK MSYS directory
Run qmk compile -e CONVERT_TO=promicro_rp2040 -kb {PATH TO KEYBOARD} -km default in QMK MSYS
Output should be in qmk_firmware/.build

Using other bootloaders

If your MCU does not use UF2 it likely supports one of these other bootloaders

Caterina

qmk flash -kb /build -km default

Other Bootloaders

Using VIA to change layout

Install VIA or use the web version
Navigate to settings and enable show design tab
Navigate to design and press load
Select the the via.json file of the desired board

a preconfigured layout.json is in each complete board