add admin panel

Co-authored-by: Jan-Marlon Leibl <jleibl@proton.me>
Reviewed-on: #20

config/packages/translation.yaml

@@ -0,0 +1,7 @@
+framework:
+    default_locale: de
+    translator:
+        default_path: '%kernel.project_dir%/translations'
+        fallbacks:
+            - de
+        providers: