Auth 2.0.0

Auth 2.0 is here 🎉
👤 Authentication and Authorization framework for Fluent (Authorization coming soon).

The Auth API Template has also been updated:

vapor new Hello --template=auth-template

Docs:
https://docs.vapor.codes/3.0/auth/getting-started/

API Docs:
https://api.vapor.codes/auth/latest/Authentication