This pull request introduces a new advanced search functionality in the examples/custom-functions/advanced_search.py file. The changes include importing necessary libraries, setting up environment variables, and defining a new asynchronous function to search the web using the Tessa API.

Key changes:

• Added necessary imports including json, os, sys, requests, asyncio, dotenv, langchain_openai, and pydantic.
• Configured the Controller to exclude specific actions and set up the BEARER_TOKEN from environment variables.
• Defined an asynchronous function search_web to perform a web search using the Tessa API and filter results based on a minimum score.
• Implemented a main function to create a task, initialize an Agent with a specific task and model, and run the agent asynchronously.
• Ensured the script runs the main function asynchronously when executed directly.