Refactor translations to XLIFF format, enhance elimination workflows, and update compose configuration

This commit switches translations from YAML to XLIFF format for better standardization, updates the elimination preparation process with UI and functionality improvements, tweaks form structures, adjusts compose.override.yaml for improved asset handling, and optimizes back office usability with refined translation handling.

src/Controller/Backoffice/PrepareEliminationController.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller\Backoffice;
+
+use App\Entity\Elimination;
+use App\Entity\Quiz;
+use App\Entity\Season;
+use App\Factory\EliminationFactory;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+final class PrepareEliminationController extends AbstractController
+{
+    #[Route('/backoffice/elimination/{seasonCode}/{quiz}/prepare', name: 'app_prepare_elimination')]
+    public function index(Season $season, Quiz $quiz, EliminationFactory $eliminationFactory): Response
+    {
+        $elimination = $eliminationFactory->createEliminationFromQuiz($quiz);
+
+        return $this->redirectToRoute('app_prepare_elimination_view', ['elimination' => $elimination->getId()]);
+    }
+
+    #[Route('/backoffice/elimination/{elimination}', name: 'app_prepare_elimination_view')]
+    public function viewElimination(Elimination $elimination, Request $request, EntityManagerInterface $em): Response
+    {
+        if ('POST' === $request->getMethod()) {
+            $elimination->updateFromInputBag($request->request);
+            $em->flush();
+
+            if (true === $request->request->getBoolean('start')) {
+                return $this->redirectToRoute('app_elimination', ['elimination' => $elimination->getId()]);
+            }
+            $this->addFlash('success', 'Elimination updated');
+        }
+
+        return $this->render('backoffice/prepare_elimination/index.html.twig', [
+            'controller_name' => 'PrepareEliminationController',
+            'elimination' => $elimination,
+        ]);
+    }
+}