adds launch.json for running lldb visual debugging on unit tests (macOS only)
adds debug build flag to tests in makefile
temp: adds board version macro as switch to instantiate classes with the correct params (only one button needs different constructor params at the moment)
Sensor Fcp Control
adds SensorFcpControl class, which checks uart for messages from fc control board
adds git submodule fcp-common, which has macros for fcp control board telemetry transmission format
creates a set of logging commands to publish fuel cell data
throws in serial debug println output for fuel cells
General Changes
Sensor Fcp Control