feat: Add support for visionOS #548

Job	Run time
spm-test	6m 5s
test (platform=iOS\ Simulator,name=iPhone\ 14\ Pro\ Max, test)	11m 33s
linux	2m 11s
test (platform\=tvOS\ Simulator,name\=Apple\ TV, test)	7m 57s
windows	2m 45s
test (platform=watchOS\ Simulator,name=Apple\ Watch\ Series\ 5\ \(40mm\), build)	3m 15s
test (platform=visionOS\ Simulator,name=Apple\ Vision\ Pro, test)	8m 21s
test (platform=macOS, test)	8m 7s
cocoapods	12m 5s
xcode-test-5_5	1m 19s
docs	1m 34s
	1h 5m 12s

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