[Docs] Explain how to enable plugins in Xcode and Xcode Cloud #137

Job	Run time
Compatibility test	4m 47s
Swift 6 Language Mode	0s
Example packages / Linux (5.9)	18m 15s
Example packages / Linux (5.10)	15m 24s
Example packages / Linux (6.0)	18m 26s
Example packages / Linux (nightly-6.0)	22m 9s
Example packages / Linux (nightly-main)	31s
Integration test / Linux (5.9)	2m 51s
Integration test / Linux (5.10)	2m 43s
Soundness / API breakage check	0s
Integration test / Linux (6.0)	2m 18s
Soundness / Broken symlinks check	3s
Integration test / Linux (nightly-6.0)	4m 20s
Integration test / Linux (nightly-main)	28s
Soundness / Documentation check	1m 55s
Soundness / Format check	1m 13s
Soundness / License headers check	7s
Soundness / Shell check	1m 9s
Soundness / Unacceptable language check	8s
Soundness / Python lint check	6s
Soundness / YAML lint check	0s
Unit tests / Unit tests / Linux (5.9)	2m 30s
Unit tests / Unit tests / Linux (5.10)	2m 20s
Unit tests / Unit tests / Linux (6.0)	2m 28s
Unit tests / Unit tests / Linux (nightly-6.0)	2m 53s
Unit tests / Unit tests / Linux (nightly-main)	29s
	1h 47m 33s

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