Introduce importmap, enhance elimination workflows, and update assets

This commit adds initial importmap configuration to manage assets, updates the elimination preparation workflow with form enhancements and database changes, introduces new styles and JS assets, refines translations, and improves entity handling with an input bag update method.

templates/backoffice/quiz.html.twig

@@ -62,7 +62,7 @@
                     <ul class="dropdown-menu">
                         {%~ for elimination in quiz.eliminations %}
                             <li><a class="dropdown-item"
-                                   href="{{ path('app_prepare_elimination_view', {elimination: elimination.id}) }}">{{ elimination.created | format_datetime() }}</a>
+                                   href="{{ path('app_prepare_elimination_view', {elimination: elimination.id}) }}">{{ elimination.created|format_datetime() }}</a>
                             </li>
                         {%~ endfor %}
                     </ul>