This is a new project, which only has a small set of modules at the moment. Users are expected to have some Adios knowledge coming in.
See the flakes installation guide here.
See the non-flakes installation guide here.
See the usage instructions here.
You're always free to inspect the modules themselves. However, in lieu of a fancy website, the repo also provides an auto-generated JSON file with information on which options each module provides. You can find the file here.