feat(auth,sf_infrastructure): register QuestiaApi/Dio and connect link_phone remote datasource

modules/auth/lib/src/features/onboarding/onboarding_builder.dart

@@ -0,0 +1,18 @@
+import 'package:auth/src/features/onboarding/presentation/onboarding_screen.dart';
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:get_it/get_it.dart';
+import 'package:navigation/navigation.dart';
+
+class OnboardingBuilder {
+  const OnboardingBuilder();
+
+  Page<void> buildPage(BuildContext context, GoRouterState state) {
+    final NavigationContract navigationContract = GetIt.I<NavigationContract>();
+
+    return MaterialPage<void>(
+      key: state.pageKey,
+      child: OnboardingScreen(navigationContract: navigationContract),
+    );
+  }
+}