[ECO-4900] First attempt at defining public API #102

Job	Run time
lint	44s
generate-matrices	27s
SPM (Xcode 15.3, Swift 5)	42s
Xcode, macOS (Xcode 15.3, Swift 5)	2m 19s
SPM (Xcode 16-beta, Swift 6)	1m 1s
Example app, macOS (Xcode 15.3, Swift 5)	1m 35s
Xcode, iOS (Xcode 15.3, Swift 5)	2m 5s
Example app, iOS (Xcode 15.3, Swift 5)	1m 34s
Xcode, tvOS (Xcode 15.3, Swift 5)	2m 19s
Example app, tvOS (Xcode 15.3, Swift 5)	1m 48s
Xcode, macOS (Xcode 16-beta, Swift 6)	2m 36s
Example app, macOS (Xcode 16-beta, Swift 6)	2m 31s
Xcode, iOS (Xcode 16-beta, Swift 6)	2m 5s
Example app, iOS (Xcode 16-beta, Swift 6)	1m 36s
Xcode, tvOS (Xcode 16-beta, Swift 6)	2m 54s
Example app, tvOS (Xcode 16-beta, Swift 6)	2m 16s
all-checks-completed	2s
	28m 34s

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