Cookbook Pull Request

Description

This PR fixes a runtime error encountered while running the Multi-Agent Earnings Call example and improves the setup instructions for a faster time to hello world when executing cookbooks.

Changes included:

• Critical Fix: Updated the deprecated method coordinator.set_communication_agent to coordinator.set_email_communication_agent (fixes an AttributeError).
• Dependencies: Added missing packages to README.md and notebook cells to ensure the code runs successfully in a fresh environment (e.g., Google Colab or local uv/venv).
• Cleanup: Removed unused imports to improve code readability.

Type of Change

What type of PR is it?

• New Cookbook
  • Notebook File
    • Does it work on google colab?
  • Markdown File
• Cookbook Update
  • Code Refactoring
  • Bug Fix
• README.md Update

• Other (please describe):

Cookbook Checklist:

• My code is easy to read and well structured.
• I've tagged the versions of any dependency required.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings or errors.

• My changes do not concern the cookbooks.

README.md Checklist

• I've added my cookbook to the table.

• My changes do not concern the README file.

Additional Context

Without this fix, the agent execution fails with:
AttributeError: 'Coordinator' object has no attribute 'set_communication_agent'

Validated by running the notebook from start to finish.