feat: Migrate to go_router

lib/features/login/cubit/authentication_state.dart

@@ -2,12 +2,18 @@ part of 'authentication_cubit.dart';
 
 @freezed
 class AuthenticationState with _$AuthenticationState {
+  const AuthenticationState._();
+
   const factory AuthenticationState.unauthenticated() = _Unauthenticated;
   const factory AuthenticationState.requriresLocalAuthentication() =
       _RequiresLocalAuthentication;
   const factory AuthenticationState.authenticated({
     required String localUserId,
-    required int apiVersion,
   }) = _Authenticated;
   const factory AuthenticationState.switchingAccounts() = _SwitchingAccounts;
+
+  bool get isAuthenticated => maybeWhen(
+        authenticated: (_) => true,
+        orElse: () => false,
+      );
 }