[Feature Request] Firebase Auth Module

[BenHayat]

Problem to solve

Integrates Firebase Authentication and user claim/identity/role part of Vuetify system that almost every application needs to authenticate and authorize users.

Proposed solution

Firebase has one of the best auth system and unlike AWS or Azure, it is free and ties very nicely with Firestore database. By creating this module more developers would approach Vuetify for building Business and real world applications.

[bdeo]

@BenHayat This is a WIP. See GH-4 for more. PRs are more then welcome, as I've not been able to get around to rounding it all out yet.