feat: add skipCustomize prop

[RBV1]

🔗 Linked issue

resolves #333

❓ Type of change

• [x] 📖 Documentation (updates to the documentation or readme)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality)
• [x] ✨ 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

Add a prop to skip the global customization function.

[antfu]

I guess we could just support :customize="false" and :customize="null" instead of introducing a new prop?

[RBV1]

Nice idea! I'll try to update the PR today