Add license related metadata to commercial components

[Artur-]

Describe your motivation

The new license checker relies on reading package.json and/or the class defining the custom element to understand which identifier should be used when validating the license when the package is using the CVDL license.

Describe the solution you'd like

For package.json it assumes that there is a cvdlName field with the license identifier for any commercial component.

For the custom element class, it needs a way to figure out the same identifier in any good way that you can come up with. It does not have to be public API it can instead be some simple pattern matching to a string constant, e.g. cvdl:<cvdlName>: or whatever else that does not occur elsewhere. Do note that the identifier can probably not be in a normal comment as that will be removed by Vite in development mode.

Describe alternatives you've considered

Additional context