Generate documentation for provider configuration

[iwahbe]

Generated documentation in the registry includes arguments to the Provider resource, but it doesn't talk explicitly about the values used in pulumi config set.

Since the set of values you can use for pulumi config set myProvider:myField myValue for is exactly equivalent to new myProvider.Provider(myField: myValue) we should also generate docs for the pulumi config set form.

This is separate from copying docs from upstream bridged provider's frontmatter (https://github.com/pulumi/pulumi-terraform-bridge/pull/2068) and can be done for all providers (which is why it's a request here).

[guineveresaenger]

Related: https://github.com/pulumi/registry/issues/224

[sean1588]

thanks @iwahbe ! I think this would be a great addition.