Introduce docc documentation and "supported features" #751

Job	Run time
Test (Java) (jammy swift:6.1.2 jdk:corretto)	2m 58s
Test (Java) (macos swift:6.1.2 jdk:corretto)	51s
Benchmark (JMH) (jammy swift:6.1.2 jdk:corretto)	5m 19s
Sample JavaKitSampleApp (macos swift:6.1.2 jdk:corretto)	1s
Test (Swift) (jammy swift:6.1.2 jdk:corretto)	5m 18s
Test (Swift) (macos swift:6.1.2 jdk:corretto)	5m 17s
Sample JavaDependencySampleApp (macos swift:6.1.2 jdk:corretto)	5m 17s
Sample JavaKitSampleApp (jammy swift:6.1.2 jdk:corretto)	4m 44s
Sample JavaSieve (macos swift:6.1.2 jdk:corretto)	51s
Sample SwiftKitSampleApp (macos swift:6.1.2 jdk:corretto)	1s
Sample SwiftAndJavaJarSampleLib (macos swift:6.1.2 jdk:corretto)	1s
Sample JavaDependencySampleApp (jammy swift:6.1.2 jdk:corretto)	5m 18s
Sample JavaSieve (jammy swift:6.1.2 jdk:corretto)	2m 10s
Sample JExtractJNISampleApp (macos swift:6.1.2 jdk:corretto)	1s
Sample JavaProbablyPrime (macos swift:6.1.2 jdk:corretto)	1s
Sample JavaProbablyPrime (jammy swift:6.1.2 jdk:corretto)	5m 3s
Sample SwiftAndJavaJarSampleLib (jammy swift:6.1.2 jdk:corretto)	4m 45s
Sample SwiftKitSampleApp (jammy swift:6.1.2 jdk:corretto)	5m 16s
Sample JExtractJNISampleApp (jammy swift:6.1.2 jdk:corretto)	5m 19s
soundness / Documentation check	34s
soundness / Unacceptable language check	6s
soundness / Shell check	32s
soundness / License headers check	7s
soundness / Python lint check	5s
soundness / YAML lint check	3s
soundness / Broken symlinks check	4s
soundness / API breakage check	-1s
soundness / Format check	0s
	1h 0m 1s

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