* Allow the creation of peripherals _not_ from the pac in the peripherals macro
* Add RADIO peripheral
- Remove DerefMut hack, replace with proper Sealed impls
- Add RADIO peripheral for all chips
* Add RADIO peripheral with split method into each radio feature
* Add the peripheral module plus some helper macros in preparation
* peripheral macro
* Add peripheral generation macro
* Fixes after rebase
* Update the signature of Peripherals::take
* syncronise hello world example
* fmt the entire repo
Co-authored-by: Jesse Braham <jesse@beta7.io>