feat: implement clocks enabling

fix: unicode strings

Revert "feat: atomic register modifications"

This reverts commit 997dd77e0476ee3929fdab6b1ad29cef85f32c2b.

feat: implement cdc application layer, fix enumeration

feat: atomic register modifications

fix: usb should not rewrite DIEPCTL bits

feat: add rx data callback, increase tx fifo size

fix: make queue thread safe

fix: ensure register access are inline

chore: fix packing on x86_64

feat: use task_result to indicate blocking

There should be no spin loops inside of the
interrupts, so this change removes them,
and instead uses a result system that has
WOULD_BLOCK result. When this result is returned,
it is expected there was no side-effect and the
function can safely be reran later.

feat: implement enumeration fully

chore: update pin, exti, delay

docs: add documentation comments to most functions

feat: implement usb devicd cdc descriptors, init, setup

feat: move all sending instructions to generic send functions

feat: implement most of enumeration

feat: fix usb bitmaps

feat: receive setup packets

feat: implement simple control usb read, writes