Try QuartoNotebookRunner.jl to speed up docs build

[visr]

Currently our docs build take 26 minutes. Our example notebooks take up a lot of that time. They are executed in Python, and then run the core with subprocess starting julia for each model. So it needs to load and compile each time. I suspect that if we run from Julia instead it will be faster since compiled code remains available in the session. With QuartoNotebookRunner v0.13 it should be possible to combine both Python and Julia.

https://discourse.julialang.org/t/ann-native-julia-engine-for-quarto-using-quartonotebookrunner-jl/112753/56