Add SECURITY.md #753

Job	Run time
shellcheck	3m 7s
build	5m 3s
copyright	3m 14s
checkstyle	3m 25s
javadoc	4m 9s
spotbugs	5m 19s
tests/cli-linux	4m 56s
cli/linux-amd64	4m 35s
tests/cli-functional-linux	6m 34s
cli/windows-amd64	5m 49s
vscode-ext	4m 0s
tests/archetype-linux	4m 43s
cli/darwin-amd64	6m 22s
tests/linker-linux	4m 37s
tests/others-linux	5m 49s
tests/cli-windows	6m 18s
tests/cli-functional-windows	7m 20s
tests/archetype-windows	5m 35s
tests/linker-windows	5m 21s
tests/others-windows	7m 16s
cli/binaries	8s
tests/results	6s
gate	1s
	1h 43m 47s

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