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/@jsonjoy.com/buffers/lib/toBuf.js

@@ -0,0 +1,12 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.toBuf = void 0;
+const encode_1 = require("./utf8/encode");
+const toBuf = (str) => {
+    const maxLength = str.length * 4;
+    const arr = new Uint8Array(maxLength);
+    const strBufferLength = (0, encode_1.encode)(arr, str, 0, maxLength);
+    return arr.slice(0, strBufferLength);
+};
+exports.toBuf = toBuf;
+//# sourceMappingURL=toBuf.js.map