* Rework hal initialization
* Turn sw interrupt control into a virtual peripheral
* Return a tuple instead of a named struct
* Fix docs
* Remove SystemClockControl
* Move software interrupts under interrupt
* Re-document what's left in system
* Update time docs
* Update sw int docs
* Introduce Config
* Fix tests
* Remove redundant inits
* Doc
* Clean up examples&tests
* Update tests
* Add changelog entry
* Start migration guide
* Restore some convenience-imports
* Remove Config from prelude
