feat : init Central project — Symfony 8 + Nuxt 4 + Docker starter

Same architecture as Lesstime: API Platform 4, JWT auth, @malio/layer-ui,
PostgreSQL 16, Docker Compose (ports 8083/3003/5436), dark mode theme.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/DataFixtures/AppFixtures.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\DataFixtures;
+
+use App\Entity\User;
+use Doctrine\Bundle\FixturesBundle\Fixture;
+use Doctrine\Persistence\ObjectManager;
+use Symfony\Component\PasswordHasher\Hasher\UserPasswordHasherInterface;
+
+class AppFixtures extends Fixture
+{
+    public function __construct(
+        private readonly UserPasswordHasherInterface $passwordHasher,
+    ) {}
+
+    public function load(ObjectManager $manager): void
+    {
+        $admin = new User();
+        $admin->setUsername('admin');
+        $admin->setRoles(['ROLE_ADMIN']);
+        $admin->setPassword($this->passwordHasher->hashPassword($admin, 'admin'));
+        $manager->persist($admin);
+
+        $userAlice = new User();
+        $userAlice->setUsername('alice');
+        $userAlice->setRoles(['ROLE_USER']);
+        $userAlice->setPassword($this->passwordHasher->hashPassword($userAlice, 'alice'));
+        $manager->persist($userAlice);
+
+        $userBob = new User();
+        $userBob->setUsername('bob');
+        $userBob->setRoles(['ROLE_USER']);
+        $userBob->setPassword($this->passwordHasher->hashPassword($userBob, 'bob'));
+        $manager->persist($userBob);
+
+        $manager->flush();
+    }
+}