feat: Add `focus` method to alert #4366

Job	Run time
dry-run / Build collection-hooks	50s
dry-run / Build global-styles	21s
dry-run / Build jest-preset	23s
dry-run / Build browser-test-tools	2m 49s
dry-run / Build documenter	1m 54s
dry-run / Build test-utils	1m 17s
dry-run / Build component-toolkit	1m 1s
dry-run / Build theming-core	1m 15s
dry-run / Build components	7m 6s
dry-run / Components unit tests	8m 17s
dry-run / Build board components	3m 54s
dry-run / Components accessibility tests	29m 19s
dry-run / Components integration tests	20m 46s
dry-run / Demos tests	12m 37s
	1h 31m 49s

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