make chat message components their own subclass of ListBoxRow

components/chatmessage.hpp

@@ -0,0 +1,13 @@
+#pragma once
+#include <gtkmm.h>
+#include "../discord/discord.hpp"
+
+class ChatMessageItem : public Gtk::ListBoxRow {
+public:
+    Snowflake ID;
+};
+
+class ChatMessageTextItem : public ChatMessageItem {
+public:
+    ChatMessageTextItem(const MessageData* data);
+};