`nuxt db generate` doesn't detect the `buildDir` configuration

[uAtomicBoolean]

Describe the bug
I set a custom build directory using the buildDir option in the configuration, but the nuxt db generate still checks for .nuxt instead of the new directory (nuxt-build in my case).

Steps to reproduce

1. Add the buildDir option in the configuration with a custom path.
2. Create a schema for the database.
3. Run nuxt db generate.

Expected behavior
The command should detect the configuration and use the custom path instead of the default one.