[skip ci] docs

docs/auth/quick-start.md

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+---
+title: Authentication Quick Start
+description: Get to grips with the basics of auth in React Native Firebase
+---
+
+# Auth Quick Start
+
+## Module usage
+
+TODO
+
+## Subscribe to auth state changes
+
+TODO
+
+## Persisting the users auth state
+
+TODO
+
+## Reacts lifecycle
+
+TODO
+
+## Auth providers