helm/charts ? reverse-engineered prompt

Build me a GitHub repository for a Helm charts collection that feels like the old official charts project. I want it to clearly separate charts into stable and incubator folders, with the right README instructions for adding the repo, installing charts, and contributing changes. Make it look like a maintained archive, with a clear notice that it is no longer actively supported, plus contribution guidance, review rules, and ownership files for charts that need them.

I also want a simple workflow for keeping chart packages organized and published the way a chart repository should work, so people can browse, install, and update charts without confusion. Keep the structure tidy, add sensible defaults for documentation and community rules, and make sure it is easy for someone to understand where charts live and how they move from incubator to stable. If you need current Helm docs to match the latest guidance, look them up online.