Writing and Reading 'persistent' data using FlashEEPROM (journaling) module

Thanks! Yes, I think perhaps right at the top of the FlashEEPROM reference we should include information about reading an writing JSON (perhaps even adding utility functions for it?).

IMO initially most people won't be worried about storage footprints... That should only really come later if they find there's a problem (which is probably unlikely with a 128kB flash page on the Pico!)...