Media integration

If implemented as media, we could reuse codepens in more ways.

One way to go is as mglaman describes in https://mglaman.dev/blog/adding-codepen-oembeds-your-drupal-site

That will use the Oembed media source plugin, and define Codepen as a provider.

But that will only render the oembed response, without extra options.

I think the way Media Iframe → defines a media source with the Iframe field is a model of how we could use the Codepen field in this module as the storage field for a media type.