Create tools/jules.md with setup instructions

This file provides instructions for the agent on how to install necessary dependencies like Ollama and Bats, and how to run the demo suite for this repository. It also includes information about the library structure, and guidelines for working with the demos and tests, and a note about a known issue with installing Bats.

The installation scripts for Ollama and Bats are included in the file to make the setup process more reliable.

Author: google-labs-jules[bot]