Jupyter Notebook Example & Getting-Started Guide

[github-actions]

Description

Add a Jupyter notebook (examples/basic_rag.ipynb) that walks through the full pipeline step-by-step with prose explanations, and a docs/getting-started.md guide.

Motivation

A notebook lowers the barrier to entry for data scientists and ML practitioners who prefer interactive environments over scripts. Good documentation is what turns visitors into contributors.

Acceptance criteria

• examples/basic_rag.ipynb — notebook that runs end-to-end using built-in components (no API key needed)
• Each notebook section has a markdown cell explaining what the code does and why
• Notebook covers: install → load → chunk → embed → ingest → query → inspect results
• All cells execute without errors (jupyter nbconvert --to notebook --execute examples/basic_rag.ipynb)
• docs/getting-started.md with: installation options, quickstart code, explanation of each ABC, link to CONTRIBUTING.md
• CHANGELOG.md updated under [Unreleased]

Files to touch

• examples/basic_rag.ipynb — new notebook
• docs/getting-started.md — new doc page
• examples/README.md — add notebook to the table

Resources

• examples/basic_rag.py — the script version to convert to a notebook
• nbformat docs if creating the notebook programmatically