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

app/views/moderation_reports/create.js.erb

@@ -0,0 +1 @@
+Danbooru.notice("Report submitted.");