Add "Add required modules" section.

[Decipher]

Is your feature request related to a problem? Please describe.
As a Druxt module developer I want a "Add required modules" section in the template Nuxt as it's a common task.

Describe the solution you'd like

• Add default "Add required modules." section

Describe alternatives you've considered
N/A

Additional context
https://github.com/druxt/druxt-auth/blob/ae658693adecf53dad89abbfdd49bbaeb00201fa/src/index.js#L35-L36