* Update MSRV to 1.88
* Clean up lints
* Generate new baseline
* Bump MSRV of xtensa-lx-rt
* Do not try to replace in semver baseline, bump dependent msrvs
* Changelog
* Remove patches and just use git dependency for PACs instead
* Various `README.md` normalization/updates for simpler packages
* Update `README.md` for `esp-hal` and `esp-lp-hal`
* Update repo-level `README.md`
* Add README, improve documentation for `esp-hal-procmacros`
* Improve documentation for `esp-hal-smartled`
* Use esp-rs logo for all packages' documentation