start earnest ucbus-drop stepper fw

.gitmodules

2021-06_fab-step-ucbus/eagle.epf

2021-06_fab-step-ucbus/fab-step-ucbus.brd

2021-06_fab-step-ucbus/fab-step-ucbus.sch

fab-step-controller/src/main.cpp

firmware/fab-step/.gitignore

firmware/fab-step/.vscode/extensions.json

firmware/fab-step/include/README

firmware/fab-step/lib/README

firmware/fab-step/platformio.ini

firmware/fab-step/src/config.h

firmware/fab-step/src/drivers/step_a4950.cpp

firmware/fab-step/src/drivers/step_a4950.h

firmware/fab-step/src/indicators.h

firmware/fab-step/src/main.cpp

firmware/fab-step/src/osape-d21

firmware/fab-step/src/syserror.cpp

firmware/fab-step/src/syserror.h

firmware/fab-step/test/README