Use EESSI Action and Quarto to give more dynamic documentation

[ocaisa]

With Quarto documents you can create dynamic output from bash, python, etc. (see https://quarto.org/docs/computations/execution-options.html#output-options). Together with our GitHub Action, this gives us scope to dynamically include information from the EESSI stack (think host_injections scripts, what initialisation looks like,...)

MkDocs has a plugin to support this: https://pypi.org/project/mkquartodocs/