[main] Added Stepper Motor Initialization (STEP). Implemented UART Interrupts to enable control via a serial console. Implemented UART_Comm function to control the system in real time via serial console. Modified main function to enable new functionality.
[STEP] Created STEP Driver for stepper motors based on the DRV8825 with carrier board from Pololu.
[SPI] Changed stHandle to stDeviceHandle to avoid confusion with Handles from other modules.