fixed merge conflicts and added verbose args

[TegveerG]

Describe your changes

fixed merge conflicts by incorporating latest changes and add atexit line.
pytest run on 'src/tests/test_connection.py` successfully passes

Issue number

Closes #551
Closes #458

Checklist before requesting a review

• Performed a self-review of my code
• Formatted my code with pkgmt format
• Added tests (when necessary).
• Added docstring documentation and update the changelog (when needed)

---

📚 Documentation preview 📚: https://jupysql--563.org.readthedocs.build/en/563/

[edublancas]

I thought of an improvement, we could print a message so we let the user know we close the connections. essentially we can add a verbose (default should be false) argument to close_all, when true, we can print(f"Closing {key}")

then modify the atexit.register(close_all, verbose=True)