migrate to github actions #9

Job	Run time
Unit tests / Linux (5.9 - jammy)	11m 17s
Unit tests / Linux (5.10 - jammy)	11m 17s
Unit tests / Windows (${{ matrix.swift_version }} - ${{ ((contains(matrix.swift_version, 'nightly') && 'windows-2019') \|\| 'windows-2022') }})	0s
Unit tests / Linux (6.0 - jammy)	12m 33s
Unit tests / Linux (nightly-main - jammy)	13m 6s
Unit tests / Linux (nightly-6.0 - jammy)	12m 54s
Soundness / API breakage check	2m 41s
Soundness / Documentation check	2m 2s
Soundness / Broken symlinks check	3s
Soundness / Format check	38s
Soundness / License headers check	5s
Soundness / Python lint check	6s
Soundness / Shell check	35s
Soundness / Unacceptable language check	4s
Soundness / YAML lint check	3s
	1h 7m 24s

Provide feedback