Core/PacketIO: Update opcodes and packet structures to 8.2.5

Port From (https://github.com/TrinityCore/TrinityCore/commit/ee2e49429f4383732b4e0f39b493470b9c1dd10c)

Source/Game/Entities/Object/ObjectGuid.cs

@@ -295,6 +295,7 @@ namespace Game.Entities
             {
                 case HighGuid.Player:
                 case HighGuid.Item:
+                case HighGuid.ChatChannel:
                 case HighGuid.Transport:
                 case HighGuid.Guild:
                     return true;

Source/Game/Entities/Object/Update/UpdateField.cs

@@ -319,8 +319,10 @@ namespace Game.Entities
             _changesMask = new UpdateMask(changeMask);
         }
 
-        public abstract void WriteCreate(WorldPacket data, UpdateFieldFlag fieldVisibilityFlags, T owner, Player receiver);
-        public abstract void WriteUpdate(WorldPacket data, UpdateFieldFlag fieldVisibilityFlags, T owner, Player receiver);
+        public virtual void WriteCreate(WorldPacket data, T owner, Player receiver) { }
+        public virtual void WriteUpdate(WorldPacket data, T owner, Player receiver) { }
+        public virtual void WriteCreate(WorldPacket data, UpdateFieldFlag fieldVisibilityFlags, T owner, Player receiver) { }
+        public virtual void WriteUpdate(WorldPacket data, UpdateFieldFlag fieldVisibilityFlags, T owner, Player receiver) { }
 
         public abstract void ClearChangesMask();