added readme to text2sql end to end usecase

[Monireh2]

What does this PR do?

This pull request adds a README file to the Text2SQL end-to-end usecase, providing documentation and instructions for users to understand and utilize the usecase.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline,
  Pull Request section?
• Was this discussed/approved via a Github issue? Please add a link
  to it if that's the case.
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

Thanks for contributing 🎉!

[IgorKasianenko]

LGTM. Please update the link in quickstart.ipynb even Ollama running Llama locally - see [here](https://github.com/meta-llama/llama-recipes/tree/main/recipes/quickstart) for examples

[IgorKasianenko]

LGTM