in particular:
* refactor the discovery book by archiving the old books and focusing new work on microbit 2 and the embassy-nrf HAL
* change svd2rust to use pointers directly and remove owned singletons
* stop having PACs re-export the interrupt macro from runtime crates (changes the macro syntax a bit as well)
* propose wg recommended alternatives to static mut and start using them in documentation and examples
* possibly set up a new team responsible for interacting with the rust project directly and with a regular meeting on the rust zulip