This will be my next revision of https://github.com/jonlamb-gh/air-gradient-pro-rs

Switching from RTICv1 to embassy

hw:

• STM32F407ZGTx (olimex STM32-E407 for now)

TODO

• get renode stuff working
• update my driver forks to use defmt
• remove unused deps in Cargo.toml, copied from example
• doc DEF_LOG, currently in .cargo/config
• fix the display async driver, occasional timeouts
• error recovery