Literate .jl scripts to produce Jupyter notebooks

[navidcy]

We can use Literate (https://fredrikekre.github.io/Literate.jl/v2/outputformats/#Literate.notebook) to produce Jupyter notebooks from scripts. Then modifying the scripts would be much easier with GitHub diff etc.

Another idea is to convert to Pluto notebooks?

[glwagner]

Both sound nice and indeed necessary if this code will live on!