feat(auth): add fully functionnal mock data source

packages/wyatt_authentication_bloc/example_router/lib/presentation/features/sign_in/widgets/sign_in_form.dart

@@ -72,7 +72,7 @@ class SignInForm extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return SignInListener(
+    return SignInListener<int>(
       onError: (context, status, errorMessage) => ScaffoldMessenger.of(context)
         ..hideCurrentSnackBar()
         ..showSnackBar(

packages/wyatt_authentication_bloc/example_router/lib/presentation/features/sign_up/widgets/sign_up_form.dart

@@ -109,7 +109,7 @@ class SignUpForm extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return SignUpListener(
+    return SignUpListener<int>(
         onError: (context, status, errorMessage) =>
             ScaffoldMessenger.of(context)
               ..hideCurrentSnackBar()