Improve compatibility between Jupyter Book on the web and downloadable notebooks

[MGomezN]

The tutorials Jupyter Book, as it is now, look nice on the web, but when downloading the Jupyter notebook, figures, references, and other features written with Myst notation are missed.
The code, however, is readable. Some suggestions on Fatiando Dev Call 2022-08-12 were:

• Short term: Add a little message saying that some things won’t look OK in the notebook and to refer to the website instead
• Try https://jupyterbook.org/en/stable/interactive/thebe.html
• Binder compatibility