The Big Split - Refactor Out a Clean Javascript Simulator and Create a Native ipywidget

[psychemedia]

Refactor the code to provide a very clean split between the js components, the proxy widget hooks, and the python wrapper. Also separate out the neural network components that are not directly related to nbev3devsim into a separate package or plugin/extension package.

Ideally, at the end, we should have:

• a standalone Javascript package that can run the simulator purely as a Javascript app; hooking a simple text editor back in as per the original ev3devsim simulator [backup] would be sensible as an optionally enabled element;
• a clean install of the Javascript package within the proxied widget;
• a clean Python API wrapper that communicates with the proxy widget;
• separated neural network packages;
• cleanly separated IPython magics.

Once this is done, we can look at creating a native ipywidget and remove the jp-proxy_widget wrapper. A handy crib for this might be something like the jupyter-widgets/ipyleaflet package which wraps the leaflet Javascript interactive map package.

All the way along, we should try to ensure that a simple generic Python wheel can be constructed that will work in JupyterLite (one of the aims of tidying things up is to create a JupyterLab extension that can run nbev3devsim in JupyterLite.

At some point, I guess we could also try to figure out how to swap out skulpt for pyodide?!