* Use SysTick as OS tick timer
* Use LPTIM2 as tickless idle timer
* Remove dummy LPTIM2 IRQ handler
* Clean up clock init code
* Rename os timer to idle timer
* Advance hal ticks along with FreeRTOS's
* Improve SysTick control during tickless idle
* Improve idle timer precision
* Correct SysTick IRQ priority
* Main, FuriHal: move system startup to separate thread
* Minor code cleanup
Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
* FuriHal: refactor interrupts subsystem
* Furi,FuriHal: gather all ISRs under interrupt API, improve crtitical section and cleanup garbage
* FuriHal: mirgate ipcc and hsem to LL
* Format Sources
* FuriHal,BleGlue: move to new critical section
* Format Sources
* FuriHal: correct flash locking
* FuriHal: replace critical section with interrupt disable in OS routine, minor fixex
* Makefile, Scripts: new linter
* About: remove ID from IC
* Firmware: remove double define for DIVC/DIVR
* Scripts: check folder names too. Docker: replace syntax check with make lint.
* Reformat Sources and Migrate to new file naming convention
* Docker: symlink clang-format-12 to clang-format
* Add coding style guide
