Initial commit: party-mix-app with prefetch cache, audio preload optimizations

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/bot/src/index.ts

@@ -0,0 +1,12 @@
+import createBot from './bot'
+
+const bot = createBot()
+
+process.once('SIGINT', () => bot.stop())
+process.once('SIGTERM', () => bot.stop())
+
+bot.start({
+  onStart: (info) => {
+    console.log(`Party Mix Bot started: @${info.username}`)
+  },
+})