fix(NavigationMenu): handle children on vertical orientation

[sandros94]

🔗 Linked issue

Resolves #2136

❓ 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

Properly handle children on vertical orientation.

📝 Checklist

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

[sandros94]

Recording.2024-10-15.125348.mp4

A few things needs to be addressed:

1. width jumps quite a bit (there isn't much we could do, other then defining the size beforehand)
2. I'm failing to rotate the arrow icon (😅)
3. missing v-bind="contentProps" for the vertical content (should I add a Primitive?)