This template mod, in addition to the features of the standard template mod, also has an example test mod as well as an example gametest setup. It uses Mojang mappings primarily, but also uses Quilt Mappings for Javadocs and parameter names.
For setup instructions please see the fabric wiki page that relates to the IDE that you are using.
This template is available under the MIT license. Feel free to learn from it and incorporate it in your own projects.