add bbcode support

views/threads/thread.etlua

@@ -2,7 +2,7 @@
   <div>
     <img src="<%= post.avatar_path or "/avatars/default.webp" %>">
     <div><%= post.username %></div>
-    <div><p><%- require("lapis.html").escape(post.content):gsub("\n", "<br>") %></p></div>
+    <div><p><%- post.content %></p></div>
   </div>
 <% end %>