Introduce docc documentation and "supported features" #744

Job	Run time
Test (Java) (macos swift:6.1.2 jdk:corretto)	3m 21s
Test (Java) (jammy swift:6.1.2 jdk:corretto)	2m 56s
Test (Swift) (jammy swift:6.1.2 jdk:corretto)	5m 53s
Benchmark (JMH) (jammy swift:6.1.2 jdk:corretto)	7m 27s
Sample JavaProbablyPrime (macos swift:6.1.2 jdk:corretto)	5m 30s
Test (Swift) (macos swift:6.1.2 jdk:corretto)	4m 25s
Sample JavaDependencySampleApp (jammy swift:6.1.2 jdk:corretto)	6m 39s
Sample JavaDependencySampleApp (macos swift:6.1.2 jdk:corretto)	5m 5s
Sample SwiftAndJavaJarSampleLib (macos swift:6.1.2 jdk:corretto)	6m 18s
Sample JavaKitSampleApp (macos swift:6.1.2 jdk:corretto)	5m 36s
Sample JavaSieve (macos swift:6.1.2 jdk:corretto)	3m 57s
Sample SwiftKitSampleApp (macos swift:6.1.2 jdk:corretto)	6m 5s
Sample SwiftKitSampleApp (jammy swift:6.1.2 jdk:corretto)	5m 35s
Sample JavaKitSampleApp (jammy swift:6.1.2 jdk:corretto)	4m 39s
Sample SwiftAndJavaJarSampleLib (jammy swift:6.1.2 jdk:corretto)	4m 34s
Sample JExtractJNISampleApp (macos swift:6.1.2 jdk:corretto)	5m 57s
Sample JavaSieve (jammy swift:6.1.2 jdk:corretto)	2m 10s
Sample JavaProbablyPrime (jammy swift:6.1.2 jdk:corretto)	4m 36s
Sample JExtractJNISampleApp (jammy swift:6.1.2 jdk:corretto)	5m 31s
soundness / Unacceptable language check	3s
soundness / Documentation check	34s
soundness / License headers check	6s
soundness / YAML lint check	3s
soundness / Broken symlinks check	4s
soundness / Shell check	31s
soundness / Python lint check	8s
soundness / API breakage check	0s
soundness / Format check	0s
	1h 37m 43s

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