* Unify the system peripheral
Whilst the PCR, SYSTEM and DPORT peripherals are different, we currently
use them all in the same way. This PR unifies the peripheral name in the
hal to `SYSTEM`. The idea is that they all do the same sort of thing, so
we can collect them under the same name, and later down the line we can
being to expose differences under an extended API.
The benifits to this are imo quite big, the examples now are all identical,
which makes things easier for esp-wifi, and paves a path towards the
multichip hal.
Why not do this in the PAC? Imo the pac should be as close to the
hardware as possible, and the HAL is where we should abstractions such
as this.
* changelog
* Rework watchdog timer drivers to allow enabling/disabling and feeding without traits
* Disable all watchdogs prior to `main` using the `__post_init` hook
* Update all watchdog-related examples
* Update CHANGELOG
* Address review comment
* Added init function
* Populated enums
* Adding enums
* Add TODO (according to IDF update)
* Added WDT support for ESP32-H2
* Updated hello_world example
* Add two examples for both watchdog and RTC watchdog
* Add specific bit initialization for TIMG0 and TIMG1
* Cleaning the code
* adjusting for rustfmt
* uncommented direct-boot feature test in CI
