Add SECURITY.md (#1094) #754

Job	Run time
build	5m 3s
checkstyle	3m 30s
shellcheck	3m 7s
copyright	3m 14s
javadoc	4m 7s
spotbugs	5m 20s
cli/linux-amd64	4m 39s
tests/cli-linux	5m 1s
cli/windows-amd64	5m 36s
tests/cli-functional-linux	6m 30s
vscode-ext	4m 1s
cli/darwin-amd64	6m 0s
tests/archetype-linux	4m 44s
tests/linker-linux	4m 43s
tests/others-linux	5m 52s
tests/cli-windows	5m 55s
tests/cli-functional-windows	7m 14s
tests/archetype-windows	5m 32s
tests/linker-windows	5m 20s
tests/others-windows	7m 21s
cli/binaries	4s
tests/results	6s
gate	1s
	1h 43m 0s

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