Update agent.py to switch the LLM model from Gemini to OpenAI's GPT-4.1, adjusting the API key accordingly for improved performance and compatibility.

Refactor agent.py to utilize LiteLLMModel for enhanced image processing capabilities. Implement improved file handling for various file types, including images and Excel files, allowing the agent to process content directly from provided files. Update task descriptions for clarity and error handling for file reading issues.

Refactor agent.py to implement BasicAgent class with enhanced file handling capabilities and integrate smolagents.CodeAgent for improved task processing.

init