Variantes
<x-ui.button>Padrão</x-ui.button>
<x-ui.button variant="primary">Primary</x-ui.button>
<x-ui.button variant="secondary">Secondary</x-ui.button>
<x-ui.button variant="outline">Outline</x-ui.button>
<x-ui.button variant="filled">Filled</x-ui.button>
<x-ui.button variant="ghost">Ghost</x-ui.button>