Structure of modules in config for typescript

What problem does this feature solve?

This could solve types definition for module options.

Example : When we want load module like @nuxtjs/dotenv with options, we could not have types definition for that options. In code :

import NuxtConfiguration from '@nuxt/config'

const config: NuxtConfiguration = {
  modules: [
    ['@nuxtjs/dotenv', {
      systemvars: true
    }]
  ]
}

export default config

Explain: With that we don’t have error but we don’t have types on systemvars and could not define that types

What does the proposed changes look like?

For that i propose use object for modules.

With could like that :

modules: {
  '@nuxtjs/dotenv': {}, // Without options
  '@nuxtjs/dotenv': { // With options
    systemvars: true
  }
}

And with that on modules we could define types like :

declare module '@nuxt/config/types/module' {
  export interface NuxtConfigurationModuleOptions {
    '@nuxtjs/dotenv': {
      systemvars?: boolean
    }
  }
}

<div align="right">_{This feature request is available on Nuxt community (#c9373)}</div>

[clarkdo]

@kevinmarrec @pi0 Remind: As my comment above, the order of module execution needs to be guaranteed.

[kevinmarrec]

Okay thanks @orblazer