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/examples/twitterfeed.js

@@ -0,0 +1,30 @@
+var Parser = require('../jsonparse');
+var Http = require('http');
+require('./colors');
+var p = new Parser();
+var cred = require('./credentials');
+var client = Http.createClient(80, "stream.twitter.com");
+var request = client.request("GET", "/1/statuses/sample.json", {
+  "Host": "stream.twitter.com",
+  "Authorization": (new Buffer(cred.username + ":" + cred.password)).toString("base64")
+});
+request.on('response', function (response) {
+  console.log(response.statusCode);
+  console.dir(response.headers);
+  response.on('data', function (chunk) {
+    p.write(chunk);
+  });
+  response.on('end', function () {
+    console.log("END");
+  });
+});
+request.end();
+var text = "", name = "";
+p.onValue = function (value) {
+  if (this.stack.length === 1 && this.key === 'text') { text = value; }
+  if (this.stack.length === 2 && this.key === 'name' && this.stack[1].key === 'user') { name = value; }
+  if (this.stack.length === 0) {
+    console.log(text.blue + " - " + name.yellow);
+    text = name = "";
+  }
+};