Move to Symfony Flex

The structure changed completely.
Bundles are gone. Everything is flatten in the folder `src`.
I separated import & api controllers to avoid _pollution_ in the main controller folder.

tests/WallabagAnnotationTestCase.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace App\Tests;
+
+use FOS\UserBundle\Model\UserInterface;
+use FOS\UserBundle\Model\UserManager;
+use FOS\UserBundle\Security\LoginManager;
+use Symfony\Bundle\FrameworkBundle\Client;
+use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
+use Symfony\Component\BrowserKit\Cookie;
+use Symfony\Component\HttpFoundation\Session\SessionInterface;
+use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
+
+abstract class WallabagAnnotationTestCase extends WebTestCase
+{
+    /**
+     * @var Client
+     */
+    protected $client = null;
+
+    /**
+     * @var UserInterface
+     */
+    protected $user;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->client = $this->createAuthorizedClient();
+    }
+
+    public function logInAs($username)
+    {
+        $crawler = $this->client->request('GET', '/login');
+        $form = $crawler->filter('button[type=submit]')->form();
+        $data = [
+            '_username' => $username,
+            '_password' => 'mypassword',
+        ];
+
+        $this->client->submit($form, $data);
+    }
+
+    /**
+     * @return Client
+     */
+    protected function createAuthorizedClient()
+    {
+        $client = static::createClient();
+        $container = $client->getContainer();
+
+        /** @var UserManager $userManager */
+        $userManager = $container->get('fos_user.user_manager.test');
+        /** @var LoginManager $loginManager */
+        $loginManager = $container->get('fos_user.security.login_manager.test');
+        $firewallName = $container->getParameter('fos_user.firewall_name');
+
+        $this->user = $userManager->findUserBy(['username' => 'admin']);
+        $loginManager->logInUser($firewallName, $this->user);
+
+        // save the login token into the session and put it in a cookie
+        $container->get(SessionInterface::class)->set('_security_' . $firewallName, serialize($container->get(TokenStorageInterface::class)->getToken()));
+        $container->get(SessionInterface::class)->save();
+
+        $session = $container->get(SessionInterface::class);
+        $client->getCookieJar()->set(new Cookie($session->getName(), $session->getId()));
+
+        return $client;
+    }
+}