frames: add TransportMessageFrame

src/pipecat/frames/frames.py

@@ -4,7 +4,7 @@
 # SPDX-License-Identifier: BSD 2-Clause License
 #
 
-from typing import List, Tuple
+from typing import Any, List, Tuple
 
 from dataclasses import dataclass, field
 
@@ -157,6 +157,14 @@ class LLMMessagesFrame(DataFrame):
     """
     messages: List[dict]
 
+
+@dataclass
+class TransportMessageFrame(DataFrame):
+    message: Any
+
+    def __str__(self):
+        return f"{self.name}(message: {self.message})"
+
 #
 # App frames. Application user-defined frames.
 #