update packages and add valign

scripts/reveal.js/plugin/zoom/index.ts

@@ -0,0 +1,12 @@
+import type { RevealPlugin } from 'reveal.js';
+
+// @ts-expect-error The runtime implementation remains in JS during the migration.
+import ZoomImplementation from './plugin.js';
+
+export interface ZoomPlugin extends RevealPlugin {
+	id: 'zoom';
+}
+
+const Zoom = ZoomImplementation as () => ZoomPlugin;
+
+export default Zoom;