feat: Add `focus` method to alert #4302

Job	Run time
dry-run / Build global-styles	24s
dry-run / Build jest-preset	17s
dry-run / Build browser-test-tools	2m 36s
dry-run / Build collection-hooks	45s
dry-run / Build documenter	2m 15s
dry-run / Build test-utils	1m 2s
dry-run / Build component-toolkit	1m 8s
dry-run / Build theming-core	1m 26s
dry-run / Build components	6m 10s
dry-run / Build board components	3m 32s
dry-run / Components integration tests	16m 11s
dry-run / Components unit tests	10m 52s
dry-run / Components accessibility tests	26m 36s
dry-run / Demos tests	14m 5s
	1h 27m 19s

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