feat: video-flow initial commit

- app.py: Streamlit UI for video generation workflow
- main_flow.py: CLI tool with argparse support
- modules/: Business logic modules (script_gen, image_gen, video_gen, composer, etc.)
- config.py: Configuration with API keys and paths
- requirements.txt: Python dependencies
- docs/: System prompt documentation

volcengine_binary_demo/protocols/__init__.py

@@ -0,0 +1,41 @@
+from .protocols import (
+    CompressionBits,
+    EventType,
+    HeaderSizeBits,
+    Message,
+    MsgType,
+    MsgTypeFlagBits,
+    SerializationBits,
+    VersionBits,
+    audio_only_client,
+    cancel_session,
+    finish_connection,
+    finish_session,
+    full_client_request,
+    receive_message,
+    start_connection,
+    start_session,
+    task_request,
+    wait_for_event,
+)
+
+__all__ = [
+    "CompressionBits",
+    "EventType",
+    "HeaderSizeBits",
+    "Message",
+    "MsgType",
+    "MsgTypeFlagBits",
+    "SerializationBits",
+    "VersionBits",
+    "audio_only_client",
+    "cancel_session",
+    "finish_connection",
+    "finish_session",
+    "full_client_request",
+    "receive_message",
+    "start_connection",
+    "start_session",
+    "task_request",
+    "wait_for_event",
+]