test: add some KernelTestCase

src/Story/DefaultUsersStory.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Story;
+
+use App\Factory\UserFactory;
+use Zenstruck\Foundry\Story;
+
+final class DefaultUsersStory extends Story
+{
+    public function build(): void
+    {
+        UserFactory::createMany(3);
+    }
+}