Add privacy tab in profile settings (#26484)

Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>

app/models/user_settings/dsl.rb

@@ -10,6 +10,10 @@ module UserSettings::DSL
       end
     end
 
+    def setting_inverse_alias(key, original_key)
+      @definitions[key] = @definitions[original_key].inverse_of(key)
+    end
+
     def namespace(key, &block)
       @definitions ||= {}