Introduce docc documentation and "supported features" #758

Job	Run time
Documentation check (6.1.2, corretto)	2m 38s
Test (Java) (jammy swift:6.1.2 jdk:corretto)	2m 39s
Test (Java) (macos swift:6.1.2 jdk:corretto)	2m 42s
Sample JavaKitSampleApp (jammy swift:6.1.2 jdk:corretto)	3m 22s
Sample JavaSieve (jammy swift:6.1.2 jdk:corretto)	48s
Sample JavaProbablyPrime (jammy swift:6.1.2 jdk:corretto)	3m 23s
Test (Swift) (macos swift:6.1.2 jdk:corretto)	4m 4s
Sample JavaKitSampleApp (macos swift:6.1.2 jdk:corretto)	3m 46s
Sample JavaDependencySampleApp (jammy swift:6.1.2 jdk:corretto)	5m 37s
Test (Swift) (jammy swift:6.1.2 jdk:corretto)	4m 28s
Benchmark (JMH) (jammy swift:6.1.2 jdk:corretto)	7m 3s
Sample SwiftKitSampleApp (jammy swift:6.1.2 jdk:corretto)	5m 30s
Sample JExtractJNISampleApp (jammy swift:6.1.2 jdk:corretto)	5m 27s
Sample SwiftAndJavaJarSampleLib (jammy swift:6.1.2 jdk:corretto)	4m 41s
Sample SwiftKitSampleApp (macos swift:6.1.2 jdk:corretto)	5m 36s
Sample JavaProbablyPrime (macos swift:6.1.2 jdk:corretto)	4m 4s
Sample JavaDependencySampleApp (macos swift:6.1.2 jdk:corretto)	4m 35s
Sample SwiftAndJavaJarSampleLib (macos swift:6.1.2 jdk:corretto)	4m 43s
Sample JavaSieve (macos swift:6.1.2 jdk:corretto)	2m 22s
Sample JExtractJNISampleApp (macos swift:6.1.2 jdk:corretto)	5m 23s
soundness / Documentation check	0s
soundness / License headers check	7s
soundness / Broken symlinks check	4s
soundness / Python lint check	7s
soundness / YAML lint check	5s
soundness / Shell check	32s
soundness / Format check	0s
soundness / Unacceptable language check	4s
soundness / API breakage check	0s
	1h 23m 50s

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