ci: Move to GitHub Actions #1

Job	Run time
Soundness / Documentation check	1m 10s
Soundness / License headers check	5s
Soundness / API breakage check	1m 15s
Soundness / Broken symlinks check	3s
Soundness / Unacceptable language check	5s
Soundness / Format check	36s
Soundness / Python lint check	5s
Soundness / Shell check	31s
Soundness / YAML lint check	4s
Cxx interop / Cxx interop / Linux (5.9)	52s
Cxx interop / Cxx interop / Windows (6.0)	1s
Cxx interop / Cxx interop / Linux (5.10)	51s
Cxx interop / Cxx interop / Linux (6.0)	58s
Cxx interop / Cxx interop / Linux (nightly-6.0)	1m 23s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 11s
Cxx interop / Cxx interop / Windows (nightly-6.0)	2s
Cxx interop / Cxx interop / Windows (nightly-main)	3s
Unit tests / Unit tests / Linux (5.9)	1m 25s
Unit tests / Unit tests / Windows (6.0)	2s
Unit tests / Unit tests / Linux (5.10)	1m 19s
Unit tests / Unit tests / Windows (nightly-6.0)	2s
Unit tests / Unit tests / Windows (nightly-main)	2s
Unit tests / Unit tests / Linux (6.0)	1m 41s
Unit tests / Unit tests / Linux (nightly-6.0)	1m 38s
Unit tests / Unit tests / Linux (nightly-main)	2m 6s
	17m 30s

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