* remove telemetry
* no full git clone
* add intelhex as required
* no core packages
* add `rich_click` as pip dependencies
* remove advertisings
* add intelhex as required
* install scons and Pio home from github
* replace "get_core_package_dir" for piohome and pioremote
* Add CI workflow for popular PlatformIO projects
* Run projects CI on each commit
* Run mega2560 env for Marlin project
* Run projects CI on several OS with Python 3.9
* Use the latest version of 3rd party actions
Co-authored-by: Ivan Kravets <me@ikravets.com>