Refactor code structure for improved readability and maintainability

main.py

@@ -0,0 +1,13 @@
+import uvicorn
+
+def main():
+    print("🚀 Iniciando servidor LiveKit Backend en http://0.0.0.0:8000 ...")
+    uvicorn.run(
+        "backend.main:app",  # apunta al FastAPI que ya tienes
+        host="0.0.0.0",
+        port=8000,
+        reload=True
+    )
+
+if __name__ == "__main__":
+    main()