Add Word Wrangler demos

examples/word-wrangler-gemini-live/client/src/utils/formatTime.ts

@@ -0,0 +1,8 @@
+/**
+ * Formats seconds into MM:SS format
+ */
+export function formatTime(seconds: number): string {
+  const mins = Math.floor(seconds / 60);
+  const secs = seconds % 60;
+  return `${mins}:${secs < 10 ? '0' : ''}${secs}`;
+}