[WIP] Support adding directives as docblock tags #662

Job	Run time
JS Tests (18.x)	3m 13s
Build and run integration tests (18.x)	3m 3s
Lint (18.x)	31s
JS Tests (19.x)	3m 16s
Build and run integration tests (19.x)	3m 9s
Lint (19.x)	36s
JS Tests (20.x)	2m 53s
Build and run integration tests (20.x)	2m 50s
Lint (20.x)	25s
JS Tests (21.x)	3m 4s
Build and run integration tests (21.x)	2m 50s
Lint (21.x)	30s
Publish to NPM	0s
	26m 20s

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