Create the ability to send reports to moderators

- Limited to Builders+
-- Moderator+ can also use as they may be too busy ATM
- Only on users, comments, and forum posts
- Multiple reports can be generated per instance
- Primarily posts to a moderator-only topic for viewability
- Secondarily has a table for searchability
-- Viewable only by moderators

config/danbooru_default_config.rb

@@ -305,6 +305,10 @@ module Danbooru
       "help:appeal_notice"
     end
 
+    def report_notice_wiki_page
+      "help:report_notice"
+    end
+
     def replacement_notice_wiki_page
       "help:replacement_notice"
     end