Add openrouter api

[vishalsharma966]

Please add open router api for ease of changing llm models.

[wxai-space]

Hi，The LightAgent can add base_url that are compatible with the OpenAI format, including OpenRouter. Could you please tell me if there were any errors during your operation?

from LightAgent import LightAgent

# Initialize Agent
agent = LightAgent(
     role="Please remember that you are LightAgent, a useful assistant that helps users use multiple tools.",  # system role description
     model="gpt-4.1",  # Supported models: openai, chatglm, deepseek, qwen, etc.
     api_key="your_api_key",  # Replace with your large model provider API Key
     base_url="https://openrouter.ai/api/v1",  # Replace with your large model provider api url
 )
# Run Agent
response = agent.run("Who are you?")
print(response)