Put serial monitor information into SD card

[NathanJesudason]

Describe the feature you'd like
Right now we cannot access serial monitor information when we're not in a particular code version or there's no laptop connected. It would be nice if we just saved most, if not all, serial prints into the SD cards.

What is the scenario where someone would want this feature?
This is useful whenever the sampler runs without a laptop connected to it

Describe alternatives you've considered
I thought about limiting to just halting issues or "major" serial prints, but realistically it wouldn't be too time consuming to save basically every serial print. I have some concern about saving serial print about saving into the SD card causing an infinite loop, but this can be easily avoided.

Acceptance Criteria
Serial prints are saved into the SD Card.

Additional context
Not sure which version this should target... Most likely V4.2 and V4.3