Feature request: Add make:theme Artisan command

[kaidesu]

Is your feature request related to a problem? Please describe.

Since merging in the Caffeinated Themes package natively, we still need to include our own make:theme command. Ideally, this will scaffold a new theme with a very minimal structure as to not impose any defaults for things like frontend frameworks or javascript libraries.

Describe the solution you'd like

php artisan make:theme Test

Feature request checklist

• This is a single feature (i.e. not a re-write of the entire CMS)
• The title starts with "Feature request: " and is followed by a clear feature name (Ex: Feature request: add konami code to control panel)
• I have searched for existing issues and to the best of my knowledge this is not a duplicate