Multiple languages support

[NeroBlackstone]

Feature request

[rikhuijzer]

This was fixed in #60. At https://huijzer.xyz/Books.jl/other-notes you can see that the docs point now to https://juliadatascience.io/ for an example of a multilingual book.

Basically, what we do is we develop both books as stand-alone books and place one book at, for example, the main site and the other one at a prefix like pt (for Portugese). Then we publish both outputs to the same website. Here is the Portugese version with the

 online_url_prefix = "pt"

And the Chinese version is here. This site pushes to https://cn.julialang.org.