turning a lot of includes into forward declares

src/providers/emoji/Emojis.hpp

@@ -1,6 +1,5 @@
 #pragma once
 
-#include "messages/Emote.hpp"
 #include "util/ConcurrentMap.hpp"
 
 #include <QMap>
@@ -12,6 +11,9 @@
 
 namespace chatterino {
 
+struct Emote;
+using EmotePtr = std::shared_ptr<const Emote>;
+
 struct EmojiData {
     // actual byte-representation of the emoji (i.e. \154075\156150 which is
     // :male:)