[Feature] Allow settings the log level at runtime for better debugging

[LucHeart]

Pre-submission checklist

• [x] I checked that there is no other Feature Request describing my wish.
• [x] I checked that this feature is, in fact, not supported.
• [x] I accept that this issue may be closed if any of the above are found to be untrue.

What should be possible that currently is not?

We should allow for setting the log level via a serial command for better debugging

Other remarks

No response

[hhvrc]

Unsure if this is smart to do, worried about inflating image size so that some boards with small flash size become unusable