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/adjust-sourcemap-loader/codec/webpack-bootstrap.js

@@ -0,0 +1,21 @@
+'use strict';
+
+/**
+ * Codec for webpack generated bootstrap code.
+ * @type {{name:string, decode:function, abstract:boolean}}
+ */
+module.exports = {
+  name    : 'webpackBootstrap',
+  decode  : decode,
+  abstract: true
+};
+
+/**
+ * Validate the given uri (abstract).
+ * @this {{options: object}} A loader or compilation
+ * @param {string} uri A source uri to decode
+ * @returns {boolean|string} False where unmatched else True
+ */
+function decode(uri) {
+  return /^webpack\/bootstrap\s+\w{20}$/.test(uri);
+}