feat: add reusable announceToScreenReader helper and update block.js … #674

Job	Run time
Build (Node 22.x)	59s
Cypress E2E	2m 28s
Build (Node 20.x)	56s
Lint & format-check changed JS files	54s
Lint commit messages	49s
Security audit	11s
Jest tests & coverage	1m 15s
	7m 32s

Provide feedback