Added support for Twitch's Chat Replies (#3722)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/providers/twitch/IrcMessageHandler.hpp

@@ -3,6 +3,10 @@
 #include <IrcMessage>
 #include "common/Channel.hpp"
 #include "messages/Message.hpp"
+#include "providers/twitch/TwitchChannel.hpp"
+#include "providers/twitch/TwitchMessageBuilder.hpp"
+
+#include <vector>
 
 namespace chatterino {
 
@@ -20,6 +24,10 @@ public:
     std::vector<MessagePtr> parseMessage(Channel *channel,
                                          Communi::IrcMessage *message);
 
+    std::vector<MessagePtr> parseMessageWithReply(
+        Channel *channel, Communi::IrcMessage *message,
+        const std::vector<MessagePtr> &otherLoaded);
+
     // parsePrivMessage arses a single IRC PRIVMSG into 0-1 Chatterino messages
     std::vector<MessagePtr> parsePrivMessage(
         Channel *channel, Communi::IrcPrivateMessage *message);
@@ -59,6 +67,10 @@ private:
     void addMessage(Communi::IrcMessage *message, const QString &target,
                     const QString &content, TwitchIrcServer &server,
                     bool isResub, bool isAction);
+
+    void populateReply(TwitchChannel *channel, Communi::IrcMessage *message,
+                       const std::vector<MessagePtr> &otherLoaded,
+                       TwitchMessageBuilder &builder);
 };
 
 }  // namespace chatterino