Update foundational examples with script dependencies

examples/foundational/07b-interruptible-langchain.py

@@ -4,6 +4,11 @@
 # SPDX-License-Identifier: BSD 2-Clause License
 #
 
+# /// script
+# dependencies = [
+#   "pipecat-ai[daily,webrtc,websocket,runner,silero,deepgram,langchain,cartesia]>=0.0.77",
+# ]
+# ///
 
 import os
 
@@ -25,6 +30,8 @@ from pipecat.processors.aggregators.llm_response import (
     LLMUserResponseAggregator,
 )
 from pipecat.processors.frameworks.langchain import LangchainProcessor
+from pipecat.runner.types import RunnerArguments
+from pipecat.runner.utils import create_transport
 from pipecat.services.cartesia.tts import CartesiaTTSService
 from pipecat.services.deepgram.stt import DeepgramSTTService
 from pipecat.transports.base_transport import BaseTransport, TransportParams