fix(FormField): block form field injection after use

[romhml]

🔗 Linked issue

Resolves #3736

❓ 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

Blocks the form field injection after the useFormField composable is used to avoid duplicating events when nesting input components.

This fixes an issue with the USelectMenu component which uses the UInput component internally, where both the UInput and USelectMenu would send validation events to the Form component. With this change, only the SelectMenu will send these events.

📝 Checklist

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

[nuxthub-admin]

✅ Deployed ui3

Deployed ui3 d6df521 to preview

🔗	fix-form-nested-input.ui-6q2.pages.dev
📌	7f36afe1.ui-6q2.pages.dev
📱	View QR Code

📋 View deployment logs

[pkg-pr-new]

npm i https://pkg.pr.new/@nuxt/ui@4150

commit: d6df521