feat: generate tsconfig.json when not using nuxt/cli

[wattanx]

🔗 Linked issue

❓ 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

.nuxt/tsconfig.json is only generated for the nuxi command.
Composables such as useNuxtApp can be used without migrating to the nuxi command.
I want to use .nuxt/tsconfig.json even when using such composables without using the nuxi command, so that I can generate it.
(I want to reduce the pain of setting up my own aliases such as #imports.)

📝 Checklist

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