* Unify the xtal frequency features for ESP32 and ESP32-C2
* Group and re-organize features for `esp-hal-common`
* Update `esp-hal-smartled` and fix its CI check
* Update `CHANGELOG.md`
* Update feature names in documentation
* Bump MSRV to 1.67, check with `defmt` feature enabled in MSRV checks where applicable
* Add `esp32c6-lp-hal-procmacros` package to VS Code workspace
* Update `CHANGELOG.md`
* Add README, improve documentation for `esp-hal-procmacros`
* Improve documentation for `esp-hal-smartled`
* Use esp-rs logo for all packages' documentation
* Extract the `esp-hal-smartled` package
This (finally) eliminates the `esp_hal_common::utils` module!
* Remove all references to the old `smartled` feature from CI