added time_alive function

app.py

@@ -114,7 +114,7 @@ with open("prompts.yaml", 'r') as stream:
     
 agent = CodeAgent(
     model=model,
-        tools=[final_answer, image_generation_tool, get_current_time_in_timezone, DuckDuckGoSearchTool(), time_alive()], ## add your tools here (don't remove final answer)
+        tools=[final_answer, image_generation_tool, get_current_time_in_timezone, DuckDuckGoSearchTool(), time_alive], ## add your tools here (don't remove final answer)
     max_steps=6,
     verbosity_level=1,
     grammar=None,