refactor(@schematics/angular): add link to ai best practicies #1326

Job	Run time
list	26s
workflow (devkit-core-tests)	1m 11s
workflow (build-cli)	1m 32s
workflow (modules-builder-tests)	1m 49s
workflow (devkit-core-tests-rerun)	1m 21s
workflow (build-unit-tests)	2m 15s
	8m 34s

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