update packages and add valign

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

@@ -0,0 +1,13 @@
+import type { RevealPlugin } from 'reveal.js';
+
+// @ts-expect-error The runtime implementation remains in JS during the migration.
+import NotesImplementation from './plugin.js';
+
+export interface NotesPlugin extends RevealPlugin {
+	id: 'notes';
+	open(): void;
+}
+
+const Notes = NotesImplementation as () => NotesPlugin;
+
+export default Notes;