Implement CI workflow with check_success job which must always be green #1243

Job	Run time
analyse_changes	7s
tests / x86_64-pc-windows-gnu (windows-latest)	3m 12s
tests / x86_64-unknown-linux-gnu (ubuntu-latest)	46s
build_robotmk / build_robotmk_from_source	3m 44s
rcc / build_and_test	3m 21s
check_success	3s
	11m 13s

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