[Stepper] Updated Stepper with state getter

cmake/boardcore.cmake

src/shared/actuators/stepper/Stepper.cpp

src/shared/actuators/stepper/Stepper.h

src/shared/actuators/stepper/StepperData.h

src/shared/actuators/stepper/StepperPWM.cpp

src/shared/actuators/stepper/StepperPWM.h

src/tests/actuators/test-stepper-pwm.cpp

src/tests/actuators/test-stepper.cpp