Turn examples into live demos

[Iltotore]

It is often annoying and sometimes painful to have to pull and compile the examples from the repository instead of being able to test them directly on a website. I think it would help Tyrian to be easier to get started with. Laminar already has such demo.

Since Tyrian is already a SJS library, it is pretty straightforward to automatically build and host demos. Here is an example of a Tyrian app hosted on Github Pages (workflow file). Beware: the app is very ugly because I suck at CSS.