add Qwen interface

Qwen_agent.py

@@ -1,10 +1,10 @@
 from transformers import Qwen2VLForConditionalGeneration, AutoTokenizer, AutoProcessor
 from stream_pipeline import stream_pipeline
 from PIL import Image
+from io import BytesIO
 import torch
 import ast
 import requests
-from io import BytesIO
 
 # default: Load the model on the available device(s)
 model = Qwen2VLForConditionalGeneration.from_pretrained(