Add extended about page stub

app/lib/settings/extend.rb

@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 module Settings
   module Extend
-  	extend ActiveSupport::Concern
+    extend ActiveSupport::Concern
 
     def settings
       ScopedSettings.for_thing(self)
     end
   end
-end
+end

app/lib/settings/scoped_settings.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Settings
   class ScopedSettings < ::Setting
     def self.for_thing(object)
@@ -9,4 +11,4 @@ module Settings
       unscoped.where(thing_type: @object.class.base_class.to_s, thing_id: @object.id)
     end
   end
-end
+end