Integrate Scully (static website option)

[sinedied]

These days everything's about static website, which are quite nice for performance and SEO when building simple websites (blogs, portfolio, docs...).

The Angular option for this is called Scully, and it would be a great addition to the list of integrations of this generator.

I think some tests are needed to determine if it can be an option to the existing web target (like PWA) or if it needs to be its own target.