Add configuration page: implement ConfigurationForm, update views, templates, and routes to enable superusers to manage club settings and toggle features using django-waffle.

backend/urls.py

@@ -1,9 +1,10 @@
 from django.urls import include, path
 
-from .views import index
+from .views import configuration, index
 
 app_name = "backend"
 urlpatterns = [
     path("", index, name="index"),
     path("members/", include("backend.members.urls")),
+    path("configuration", configuration, name="configuration")
 ]