Combine Ban/Timeout pubsub actions

Fully implement PubSub ban/unban messages
Move the "message combining" to Channel::addMessage

Disable "irc" ban/timeout handling for now. In the future, we might want
to use this if you're not a moderator in a channel.

src/providers/twitch/ircmessagehandler.cpp

@@ -56,6 +56,7 @@ void IrcMessageHandler::handleRoomStateMessage(Communi::IrcMessage *message)
 
 void IrcMessageHandler::handleClearChatMessage(Communi::IrcMessage *message)
 {
+    return;
     // check parameter count
     if (message->parameters().length() < 1) {
         return;