Add Swift package index yml file #233

Job	Run time
Test / Linux (5.8 - jammy)	2m 2s
Test / Windows (5.9 - windows-2022)	10m 51s
Test / Linux (5.9 - jammy)	2m 26s
Test / Windows (6.0 - windows-2022)	9m 8s
Test / Windows (nightly - windows-2019)	10m 47s
Test / Windows (nightly-6.0 - windows-2019)	9m 19s
Test / Linux (5.10 - jammy)	2m 8s
Test / Linux (6.0 - jammy)	2m 18s
Test / Linux (nightly-main - jammy)	3m 51s
Test / Linux (nightly-6.0 - jammy)	2m 58s
Soundness / API breakage check	3m 19s
Soundness / Broken symlinks check	3s
Soundness / Format check	35s
Soundness / License headers check	0s
Soundness / Documentation check	2m 11s
Soundness / Shell check	36s
Soundness / Unacceptable language check	5s
Soundness / YAML lint check	4s
Soundness / Python lint check	3s
	1h 2m 44s

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