actions/starter-workflows ? reverse-engineered prompt

Build me a GitHub repo of starter workflows for GitHub Actions that shows up nicely when someone clicks the Actions tab and starts a new workflow.

I want a clean set of example workflow files for common things like continuous integration, deployments, automation, code scanning, and GitHub Pages, all written in YAML and paired with the extra metadata file that GitHub needs so each template has a name, description, icon, and categories. Use simple icons where it makes sense, and organize everything so it feels easy to browse and reuse.

Please make it practical and polished, with clear folder names, sensible defaults, and a README that explains what the repo is for and how the templates are meant to be used. If anything needs current GitHub docs to be accurate, look that up online.