Migration from esp-println's log-04 to defmt

[brainstorm]

We'll potentially save some memory in the process? Complicates log handling on the client side though (see deformat your logs).

[brainstorm]

Interestingly, sunset is going towards the opposite direction for simplicity, see: https://github.com/mkj/sunset/blob/7f9b83295cdd506f0eba9e533a7b5e4e7d678a49/changelog.md?plain=1#L32-L36