GraphQL - Group menu

Provides a GraphQL schema extension to expose global menu and group menu from Drupal. The requirement is to have a schema id named "graphql" (TODO to make it editable).

This module depends on drupal/graphql and drupal/group modules, here is a quick look on the full schema to expose global & group menus:

{
  menuGlobal(language: "en", menu: "main") {
    title
    url {
      path
    }
    children {
      title
      url {
        path
      }
    }
  }
  menu(groupId: "group_1", name: "name", language: "en") {
    name
    items {
      title
      url {
        path
      }
      children {
        title
        url {
          path
        }
      }
    }
  }
}