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/jsonparse/bench.js

@@ -0,0 +1,26 @@
+var fs = require('fs'),
+    Parser = require('./jsonparse');
+
+
+var json = fs.readFileSync("samplejson/basic.json");
+
+
+while (true) {
+  var start = Date.now();
+  for (var i = 0; i < 1000; i++) {
+    JSON.parse(json);
+  }
+  var first = Date.now() - start;
+
+  start = Date.now();
+  var p = new Parser();
+  for (var i = 0; i < 1000; i++) {
+    p.write(json);
+  }
+  var second = Date.now() - start;
+
+
+  console.log("JSON.parse took %s", first);
+  console.log("streaming parser took %s", second);
+  console.log("streaming is %s times slower", second / first);
+}