feat: remove easy admin bundle, adopt admin theme

config/services.yaml

@@ -108,6 +108,14 @@ services:
         arguments:
             $path: '%path_to_keys%'
 
+    App\Menu\AdminMenuBuilder:
+        arguments:
+            $factory: '@knp_menu.factory'
+        tags:
+            - name: knp_menu.menu_builder
+              method: createMainMenu
+              alias: admin_main
+
     App\Service\BpnXmlSyncManager:
         arguments:
             $xmlSource: '@xml_source.storage'