Initial commit: notification-elements-demo app

Interactive Angular 19 demo for @sda/notification-elements-ui with
6 sections: Bell & Feed, Notification Center, Inbox, Comments &
Threads, Mention Input, and Full-Featured layout. Includes mock
data, dark mode toggle, and real-time event log.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

node_modules/fast-glob/out/readers/async.d.ts

@@ -0,0 +1,10 @@
+import * as fsWalk from '@nodelib/fs.walk';
+import { Entry, ReaderOptions, Pattern } from '../types';
+import Reader from './reader';
+import ReaderStream from './stream';
+export default class ReaderAsync extends Reader<Promise<Entry[]>> {
+    protected _walkAsync: typeof fsWalk.walk;
+    protected _readerStream: ReaderStream;
+    dynamic(root: string, options: ReaderOptions): Promise<Entry[]>;
+    static(patterns: Pattern[], options: ReaderOptions): Promise<Entry[]>;
+}