Add blinking heartbeat LED to the BMS that changes color based on state

[mkamalel]

Have a blinking LED that changes color depending on the state.
Charging = blue
Running = green
Fault = Red

This would be done by finding which HET(High End Timer) pins are connected to LEDs and toggling them every half second or so to the required color refer to https://github.com/sfuphantom/vcu-fw/blob/master/VCU/Phantom/main.c ~line 336 vStateMachineTask for some examples on setting LEDs to different colors