refactor(components): FormItem single script setup

[RazorSiM]

🔗 Linked issue

572

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [x] 👌 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

"Resolves #572"

By exporting the from the file, we can remove the need of having multiple script tags inside the component. This change helps with the linters and formatters, expecially with nuxt and antfu defaults.

📝 Checklist

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

[sadeghbarati]

@RazorSiM run build registry again then we can merge this, thx

[sadeghbarati]

Thank you for your contribution 🙌