Add gin admin theme and toolbar

composer.json

@@ -55,6 +55,8 @@
         "drupal/entity": "^1.0",
         "drupal/extlink": "^1.3",
         "drupal/field_group": "^3.0",
+        "drupal/gin": "^3.0@alpha",
+        "drupal/gin_toolbar": "^1.0@beta",
         "drupal/honeypot": "^1.30",
         "drupal/linkit": "^5.0",
         "drupal/matomo": "^1.9",