Plans, subscriptions

* Plans controller
* Subscription controller
* Clean admin controller
* Ember Plans route
* Index page
* New Plans
* Translations

app/controllers/admin/plans_controller.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module DiscoursePatrons
+  class PlansController < ::Admin::AdminController
+    def index
+      head 204
+    end
+
+    def show
+      head 204
+    end
+  end
+end