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/webpack/lib/dependencies/CriticalDependencyWarning.js

@@ -0,0 +1,28 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const WebpackError = require("../WebpackError");
+const makeSerializable = require("../util/makeSerializable");
+
+class CriticalDependencyWarning extends WebpackError {
+	/**
+	 * @param {string} message message
+	 */
+	constructor(message) {
+		super();
+
+		this.name = "CriticalDependencyWarning";
+		this.message = `Critical dependency: ${message}`;
+	}
+}
+
+makeSerializable(
+	CriticalDependencyWarning,
+	"webpack/lib/dependencies/CriticalDependencyWarning"
+);
+
+module.exports = CriticalDependencyWarning;