Added the file on how run the handoffs (with a new example) in jupyter notebook

[muhammad-stack]

This pull request includes changes to the README.md file and the addition of a new example script in examples/basic/handoff_jupyter.py. The most important changes are the addition of a new Jupyter notebook example and the import and usage of the asyncio library for concurrent code execution.

Documentation updates:

• README.md: Added a reference to the new Jupyter notebook example script handoff_jupyter.py.

New example script:

• examples/basic/handoff_jupyter.py: Added a new example script demonstrating the use of Agent and Runner classes, along with the asyncio library for concurrent code execution. The script includes the creation of three agents (coding_agent, debugging_agent, and triage_agent) and an example of running the triage_agent to calculate the factorial of a number.

[rm-openai]

Weakly held opinion: I don't want to have to add jupyter-specific branches for each example. Ideally most code works out of the box in notebooks, or at the very least the examples are readable enough for jupyter users to quickly modify.

cc @dmitry-openai as well for opinions.

[dmitry-openai]

Aligned - I think we want to show the run loop differences for Jupyter, but not translate every example (since there are virtually no differences for everything else)