Introduce docc documentation and "supported features" #760

Job	Run time
Documentation check (6.1.2, corretto)	25s
Test (Java) (jammy swift:6.1.2 jdk:corretto)	2m 38s
Benchmark (JMH) (jammy swift:6.1.2 jdk:corretto)	5m 32s
Test (Swift) (macos swift:6.1.2 jdk:corretto)	2m 58s
Sample JavaSieve (jammy swift:6.1.2 jdk:corretto)	54s
Sample JavaKitSampleApp (jammy swift:6.1.2 jdk:corretto)	3m 25s
Test (Java) (macos swift:6.1.2 jdk:corretto)	2m 57s
Sample JavaKitSampleApp (macos swift:6.1.2 jdk:corretto)	1s
Sample SwiftAndJavaJarSampleLib (jammy swift:6.1.2 jdk:corretto)	4m 40s
Test (Swift) (jammy swift:6.1.2 jdk:corretto)	4m 31s
Sample JavaProbablyPrime (jammy swift:6.1.2 jdk:corretto)	3m 28s
Sample JExtractJNISampleApp (jammy swift:6.1.2 jdk:corretto)	5m 33s
Sample JavaDependencySampleApp (jammy swift:6.1.2 jdk:corretto)	5m 33s
Sample SwiftKitSampleApp (jammy swift:6.1.2 jdk:corretto)	5m 33s
Sample JavaSieve (macos swift:6.1.2 jdk:corretto)	1s
Sample JavaDependencySampleApp (macos swift:6.1.2 jdk:corretto)	5m 33s
Sample SwiftKitSampleApp (macos swift:6.1.2 jdk:corretto)	5m 33s
Sample JavaProbablyPrime (macos swift:6.1.2 jdk:corretto)	1s
Sample SwiftAndJavaJarSampleLib (macos swift:6.1.2 jdk:corretto)	5m 33s
Sample JExtractJNISampleApp (macos swift:6.1.2 jdk:corretto)	5m 33s
soundness / Unacceptable language check	3s
soundness / YAML lint check	3s
soundness / License headers check	6s
soundness / Python lint check	6s
soundness / Shell check	33s
soundness / Broken symlinks check	5s
soundness / API breakage check	0s
soundness / Documentation check	0s
soundness / Format check	0s
	1h 11m 18s

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