chore(Slider): orientation=vertical support

[jankremlacek]

❓ Type of change

• 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ 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

Added styles for <Slider orienation="vertical" />.

The orientation property is not mentioned in the documentation, but radix-vue supports it, and the property is inherited. With this update, if someone uses the orientation="vertical", it will render the <Slider /> properly.

📝 Checklist

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

Note: I did not update the documentation cause I do not know if you want to. If you want to add it to the docs, let me know.

[sadeghbarati]

@zernonia Related PR #739

Should we offer generic styles based on orientation?

[zernonia]

Yeah this addition seems straightforward and useful. LGTM!