User contact modal

* adds user/includes/contact_modal_button.html for calling contact data of a user
* adds user contact modal to intervention detail view
* adds translations

user/urls.py

@@ -13,4 +13,6 @@ app_name = "user"
 urlpatterns = [
     path("", index_view, name="index"),
     path("notifications/", notifications_view, name="notifications"),
+    path("contact/<id>", contact_view, name="contact"),
+
 ]