Sitegen history mode + new Maven plugin to help with aggregated javadocs #522

Job	Run time
build	2m 7s
shellcheck	21s
copyright	22s
checkstyle	27s
javadoc	1m 5s
spotbugs	2m 49s
cli/linux-amd64	1m 56s
tests/cli-linux	2m 8s
cli/windows-amd64	3m 36s
vscode-extension	1m 1s
tests/cli-windows	3m 31s
cli/darwin-amd64	4m 13s
tests/cli-functional-linux	3m 41s
tests/cli-functional-windows	4m 51s
tests/archetype-linux	2m 3s
tests/archetype-windows	3m 35s
tests/linker-linux	1m 43s
tests/linker-windows	3m 8s
tests/misc-linux	2m 36s
tests/misc-windows	4m 46s
	49m 59s

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