googlefonts/googlefonts-project-template — reverse-engineered prompt

Please turn this Google Fonts project template into a clean starter repo for a real font family. I want the demo content and sample font references removed, the source setup in the sources folder wired up properly, and the project files updated so someone can drop in their own Glyphs or UFO sources and actually use it. Update the config, README, article page, author and contributor files, and any links, paths, badges, or repo URLs that still point to the template.

Also make sure the build, proof, and QA flow works through the existing make commands and GitHub Actions, and that it is ready to publish the proof pages on GitHub Pages. If there are places where real font specific details are still needed, leave clear placeholders and short notes instead of inventing content. Keep it aligned with normal Google Fonts expectations, and look up the current docs online if you need to.