explain what spinx-thebe does
We need a "what the h#($ is it doing" type page that makes it easy to learn about quickly. In particular:
- links to relevant packages, pages, etc
- simple explanation of steps for how it works (@mguichard), staying at high level (name features) without describing all the details (e.g., python > pyodide > thebe lite ???? > webassembly > chrome sends to computer > processer cruches 1's and 0's). Also can say something like "Webassembly is a way for an internet browser to execute code" and link to WebAssembly page rather than explain what it is in detail.
- include a figure or diagram that lays it all out
@mguichard can you start by adding some bullet points or key text in the explanation, then I (@rlanzafame) can lay out a page in the book and assign follow-up tasks to others