fix: registerModule hook not working for js/ts format resources

[BobbieGoede]

🔗 Linked issue

#2141

❓ 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

It seems that only locales within the project langDir were being resolved in the following line: https://github.com/nuxt-modules/i18n/blob/next/src/utils.ts#L62C1-L62C92

This results in locales added via the i18n:registerModule hook and possibly layers too would not get a type or types assigned to it, which as far as I understand is required for js/ts format locales (I'm still catching up with the changes made in the last few months 😅).

Note that my changes removes the file extension check/filter in the resolve function, I could add a basic matcher to ensure each file has the correct extension if needed.

📝 Checklist

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

[kazupon]

Good job!
Thank you! ❤️

[jaydeep-stallion]

I added i18n:registerModule hook in my index.ts module's file but its not translating the messages