Automated test suite that covers publication of a range of server formats

Similar to the [api_examples doc](https://github.com/modelcontextprotocol/registry/blob/4f89a896ec37a9234792c3f2df5005e568fc0eee/docs/api_examples.md), we should embed in code the validation that our shapes support a variety of installation formats end to end.

We should think through the various cases, but at the very least we should include the examples in that API doc (npm, pypi, ghcr).