* Rework timer_queue and monotonic architecture
Goals:
* make Monotonic purely internal
* make Monotonic purely tick passed, no fugit involved
* create a wrapper struct in the user's code via a macro that then
converts the "now" from the tick based monotonic to a fugit based
timestamp
We need to proxy the delay functions of the timer queue anyway,
so we could simply perform the conversion in those proxy functions.
* Update cargo.lock
* Update readme of rtic-time
* CI: ESP32: Redact esp_image: Too volatile
* Fixup: Changelog double entry rebase mistake
---------
Co-authored-by: Henrik Tjäder <henrik@tjaders.com>
* Fix nrf::timer
* Bootstrap nrf52840-blinky example
* More work on nrf blinky example
* Fix README
* Add asserts for correct timer functionality
* Add correctness check to other monotonics as well
* Update Changelog
* Fix potential timing issues
* Fix race condition in nrf::rtc
* Add changelog
* Add rtc blinky example
* Change rtc example to RC lf clock source
* Add changelog to rtic-time
* Add changelog
* Attempt to fix CI
* Update teensy4-blinky Cargo.lock
* Implement half_period_counter in rtic-time
* Rename compute_now to calculate_now, use it in stm32 and imxrt
* Add more tests
* Add some docs
* Fix clippy warning, add imxrt timer to monotonics tests
* Bump dependency version to make sure monotonics will build properly
* Add changelog to rtic-monotonics
* Add more docs
* Add more docs
* Finish documentation
* Fix typos
* Switch from atomic-polyfill to portable-atomic
* Some more doc fixes
* More doc fixes
* Minor doc fix
* Minor doc fix
* Fix Atomics not existing
* Fix example
* Minor example improvement
* Revert back to atomic-polyfill
* Fix cargo.toml formatting
* Remove atomic-polyfill
* Attempt to fix unused macro warning
* Remove atomics completely from half period counter
* Minor doc fix
* Doc fixes
* Doc fixes
* Remove obsolete comment
* Fix ordering in monotonic initialization sequence
