Add a demo notebook

[adriengoeller]

Describe the current behavior

A demo code is provided in the documentation

Describe the expected behavior

This demo code could be adapted in a tutorial style into a notebook.
It could be a simple copy of the documentation.
It could be located in the documentation too.

Describe the motivation

For user easy manipulation it could be an instance of jupyterlite on gh pages.
Documentation here

Extra Information

No response