feat: show BTTV Pro badges (#6625)

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

docs/lua-meta/globals.lua

@@ -436,6 +436,7 @@ c2.MessageElementFlag = {
     BadgeVanity = 0,
     BadgeChatterino = 0,
     BadgeSevenTV = 0,
+    BadgeBttv = 0,
     BadgeFfz = 0,
     Badges = 0,
     ChannelName = 0,
@@ -503,6 +504,7 @@ c2.MessageFlag = {
     EventSub = 0,
     ModerationAction = 0,
     InvalidReplyTarget = 0,
+    WatchStreak = 0,
 }
 
 -- End src/messages/MessageFlag.hpp