DEV: APIs for plugin to add custom reviewable confirm modal (#12246)

lib/plugin/instance.rb

@@ -877,6 +877,13 @@ class Plugin::Instance
     DiscoursePluginRegistry.demon_processes << demon_class
   end
 
+  def add_permitted_reviewable_param(type, param)
+    DiscoursePluginRegistry.register_reviewable_param({
+      type: type,
+      param: param
+      }, self)
+  end
+
   protected
 
   def self.js_path