feat: add initial experimental Twitch Eventsub support (#5837)

Co-authored-by: nerix <nerixdev@outlook.de>

src/messages/Message.hpp

@@ -44,6 +44,8 @@ struct Message {
     QString id;
     QString searchText;
     QString messageText;
+    // TODO: This field is used ambiguously, it could use a comment or a name change to
+    // clarify the intent of the field
     QString loginName;
     QString displayName;
     QString localizedName;