Add emoji reactions to features in nodeinfo

lib/pleroma/web/nodeinfo/nodeinfo_controller.ex

@@ -74,7 +74,8 @@ def raw_nodeinfo do
         end,
         if Config.get([:instance, :safe_dm_mentions]) do
           "safe_dm_mentions"
-        end
+        end,
+        "pleroma_emoji_reactions"
       ]
       |> Enum.filter(& &1)