fix(Button): button link not showing disabled classes

[Tragio]

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Same as #2185 but for v3. Also added the respective test.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[benjamincanac]

Thanks a lot for reporting these changes on v3! 😊

[benjamincanac]

@Tragio I think we should add the aria-disabled classes on the Link component as well: https://github.com/nuxt/ui/blob/v3/src/theme/link.ts#L11. What do you think?