Extend members app: add filtering with django-filter, MemberFilter class, and initial view setup. Update URLs, templates, and dependencies for integration.

backend/urls.py

@@ -0,0 +1,9 @@
+from django.urls import include, path
+
+from .views import index
+
+app_name = "backend"
+urlpatterns = [
+    path("", index, name="index"),
+    path("members/", include("backend.members.urls")),
+]