SD Card not detected on startup

[matgyver]

At times, HAR will go to initialize the SD Card and then fail. When this happens, HAR then goes into an infinite loop as the watchdog will kick-in and reboot the board, but then it can't find the SD Card isn't found and the cycle continues.

Desired Operation

1. Scan for SD Card
2. If SD Card is present, continue and illuminate a Green status LED
3. If SD Card is not present, then give error message, illuminate a red status LED and continue

This way, if the SD Card failure happens in flight and a reboot is triggered, at HAR will continue to transmit position via LoRa.

Secondary Task

Investigate on why we are getting SD Card failures. Right now, we have to hard reboot the board to get it to work. It does not appear to be an issue with the SD Card holder. Instead it seems to be either on initialization so either software or something with the SPI bus.