**Warning: Type of PR label mismatch** To merge this PR, it requires exactly 1 label indicating the type of PR. Other labels are optional and not being checked here. - **Type-related labels to choose from**: [Type] Automated Testing, [Type] Breaking Change, [Type] Bug, [Type] Build Tooling, [Type] Code Quality, [Type] Copy, [Type] Developer Documentation, [Type] Enhancement, [Type] Experimental, [Type] Feature, [Type] New API, [Type] Task, [Type] Technical Prototype, [Type] Performance, [Type] Project Management, [Type] Regression, [Type] Security, [Type] WP Core Ticket, Backport from WordPress Core, Gutenberg Plugin. - **Labels found**: [Feature] Block API, [Feature] Extensibility, First-time Contributor. Read more about [Type labels in Gutenberg](https://github.com/WordPress/gutenberg/labels?q=type). Don't worry if you don't have the required permissions to add labels; the PR reviewer should be able to help with the task.