Add Sheet upload function

templates/backoffice/index.html.twig

@@ -3,9 +3,14 @@
 {% block title %}Hello BackofficeController!{% endblock %}
 
 {% block body %}
-    <h2 class="py-2">
-        {{ is_granted('ROLE_ADMIN') ? 'All Seasons'|trans : 'Your Seasons'|trans }}
-    </h2>
+    <div class="d-flex flex-row align-items-center">
+        <h2 class="py-2 pe-2">
+            {{ is_granted('ROLE_ADMIN') ? 'All Seasons'|trans : 'Your Seasons'|trans }}
+        </h2>
+        <a class="link" href="{{ path('app_backoffice_season_add') }}">
+            {{ 'Add'|trans }}
+        </a>
+    </div>
     <table class="table table-hover">
         <thead>
         <tr>