Include example from article

[TeriyakiBomb]

It'd be great to add this example from this article to the readme, it adds useful context for real world usage:

class ButtonComponent < ViewComponent::Base
  def initialize(color: :primary)
    @color = color
  end

  def css_classes
    ClassVariants.build(
      base: "inline-flex items-center rounded border-2 border-transparent font-medium text-sm text-white hover:text-white shadow-sm focus:outline-none focus:ring-2 focus:ring-offset-2 transition-colors duration-300 p-1",
      variants: {
        color: {
          primary: "bg-grape-500 hover:bg-grape-600 text-white dark:bg-grape-400 dark:hover:bg-grape-500",
        }
      }
    ).render(color: @color)
  end
end

[adrianthedev]

Send it in a PR @TeriyakiBomb. We'd love to feature it.