Control available code sample languages the "x-samples-languages" extension

With an array of languages present in x-samples-languages code samples will be generated for only those languages. If not present, it will default to: curl, node, ruby, javascript, and python.

If this is present alongside x-readme.samples-languages then the x-readme.samples-languages extension will take precedence over this extension.

https://docs.readme.com/guides/docs/openapi-extensions#code-sample-languages