feat(Accordion): handle horizontal orientation

[sandros94]

🔗 Linked issue

Resolves nuxt#2148

❓ 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

Missing tests, and not so great animation.

I've shared a clip on discord that shows an animation set to 2 seconds and you can clearly see that the text wraps as it opens and closes. Could impact performance on slower browsers?

📝 Checklist

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