fix(nuxt): preserve error.data in response

[Matix-Media]

🔗 Linked issue

createError does not return data nuxt/nuxt#13881

❓ 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 like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

The current error errorhandler implementation does not put the data object into the response. By adding the data object received from the _error object to the errprObject we can add the data to the response. This fixes nuxt/nuxt#13881.
It is not required to check if the object exists, as it will automatically not be appended to the errorObject if it is undefined.

📝 Checklist

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

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[pi0]

LGTM. Thanks!