Replace pyodide js code by a custom and local install

[berinhard]

Currently pyodide mode is being loaded via a public JS file. This was faster for me to focus on the changes pyp5js required to allow multiple python interpreters, but it's not ideal. Besides the fact that it prevents people from trying pyp5js offline, the current pyodide adds numpy and because of that it takes time to load the page.

The goal is to have a bare minimum pyodide install but allowing people to extend the libs via .properties.json customization.

Goals:

• To load the page faster
• To be able to customize which python lib files to be enabled via pyodide