add tool image_generation_tool

app.py

@@ -60,7 +60,7 @@ with open("prompts.yaml", 'r') as stream:
     
 agent = CodeAgent(
     model=model,
-    tools=[webpage,final_answer], ## add your tools here (don't remove final answer)
+    tools=[image_generation_tool,final_answer], ## add your tools here (don't remove final answer)
     max_steps=6,
     verbosity_level=1,
     grammar=None,