fix: fire PLAYER_MONEY event from SMSG_LOOT_MONEY_NOTIFY

The loot money handler directly updates playerMoneyCopper_ but wasn't
firing PLAYER_MONEY. The update object path fires it when the coinage
field changes, but there can be a delay. Now gold-tracking addons
(Accountant, GoldTracker) immediately see looted money.

src/game/game_handler.cpp

@@ -4784,6 +4784,7 @@ void GameHandler::handlePacket(network::Packet& packet) {
                         recentLootMoneyAnnounceCooldowns_[notifyGuid] = 1.5f;
                     }
                 }
+                if (addonEventCallback_) addonEventCallback_("PLAYER_MONEY", {});
             }
             break;
         }