refactor(hooks): remove unused PWA install and visibility hooks

refactor(package): remove deprecated dev:proxy script
fix(user): ensure user-auth-sync is exported in index

src/stores/user/index.ts

@@ -2,6 +2,7 @@
  * @file Automatically generated by barrelsby.
  */
 
+export * from "./user-auth-sync";
 export * from "./user-context";
 export * from "./user-events";
 export * from "./user-machine.actors";