auth skeleton

Include Amplify SDK, test basic auth functions, and setup framework for internal, synchronous interface.

Listify/.gitignore

@@ -12,3 +12,19 @@
 /captures
 .externalNativeBuild
 .cxx
+
+#amplify
+amplify/\#current-cloud-backend
+amplify/.config/local-*
+amplify/mock-data
+amplify/backend/amplify-meta.json
+amplify/backend/awscloudformation
+build/
+dist/
+node_modules/
+aws-exports.js
+awsconfiguration.json
+amplifyconfiguration.json
+amplify-build-config.json
+amplify-gradle-config.json
+amplifytools.xcconfig