chore: update to latest `@nuxt/module-builder`

[danielroe]

🔗 Linked issue

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• [x] 🐞 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)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Previous versions of @nuxt/module-builder produced incorrect types for files in the runtime/ directory. Specifically, a .d.ts declaration paired with a .mjs file. This isn't correct - it should be either .d.mts and .mjs or .d.ts and .js.

For maximum compatibility, @nuxt/module-builder v0.8 switched to .js extension for files in runtime/ directory.

With the latest Nuxt, this is now an error that removes correct plugin injection types.

Related PRs: https://github.com/nuxt/nuxt/pull/28480, https://github.com/nuxt/nuxt/pull/28593 See also https://github.com/nuxt/nuxt/issues/28672.

📝 Checklist

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