introduce StartInterruptionFrame and StopInterruptionFrame

src/pipecat/frames/frames.py

@@ -216,6 +216,28 @@ class StopTaskFrame(SystemFrame):
     pass
 
 
+@dataclass
+class StartInterruptionFrame(SystemFrame):
+    """Emitted by VAD to indicate that a user has started speaking (i.e. is
+    interruption). This is similar to UserStartedSpeakingFrame except that it
+    should be pushed concurrently with other frames (so the order is not
+    guaranteed).
+
+    """
+    pass
+
+
+@dataclass
+class StopInterruptionFrame(SystemFrame):
+    """Emitted by VAD to indicate that a user has stopped speaking (i.e. no more
+    interruptions). This is similar to UserStoppedSpeakingFrame except that it
+    should be pushed concurrently with other frames (so the order is not
+    guaranteed).
+
+    """
+    pass
+
+
 #
 # Control frames
 #