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/needle/bin/needle

@@ -0,0 +1,40 @@
+#!/usr/bin/env node
+var needle = require('./../lib/needle');
+
+function exit(code, str) {
+  console.log(str) || process.exit(code);
+}
+
+function usage() {
+  var out = ['Usage: needle [get|head|post|put|delete] url [query]'];
+  out.push('Examples: \n needle get google.com\n needle post server.com/api foo=bar');
+  exit(1, out.join('\n'))
+}
+
+if (process.argv[2] == '-v' || process.argv[2] == '--version')
+  exit(0, needle.version);
+else if (process.argv[2] == null)
+  usage();
+
+var method   = process.argv[2],
+    url      = process.argv[3],
+    options  = { compressed: true, parse_response: true, follow_max: 5, timeout: 10000 };
+
+if (!needle[method]) {
+  url    = method;
+  method = 'get';
+}
+
+var callback = function(err, resp) {
+  if (err) return exit(1, "Error: " + err.message);
+
+  if (process.argv.indexOf('-i') != -1)
+    console.log(resp.headers) || console.log('');
+
+  console.log(resp.body.toString());
+};
+
+if (method == 'post' || method == 'put')
+  needle[method](url, process.argv[4], options, callback);
+else
+  needle[method](url, options, callback);