Add an "unpack" task to the stager-maven-plugin #707

Job	Run time
shellcheck	3m 9s
build	5m 12s
checkstyle	3m 28s
copyright	3m 18s
spotbugs	25s
javadoc	25s
cli/linux-amd64	25s
tests/cli-linux	25s
cli/windows-amd64	23s
vscode-ext	23s
tests/cli-functional-linux	24s
cli/darwin-amd64	25s
tests/archetype-linux	25s
tests/linker-linux	25s
tests/others-linux	24s
tests/cli-windows	22s
tests/cli-functional-windows	24s
tests/archetype-windows	21s
tests/linker-windows	23s
tests/others-windows	19s
cli/binaries	1s
tests/results	1s
gate	1s
	21m 28s

Provide feedback