Updates Message Packets (#321)

### API Breaking Change
Combined `AsciiMessage` and `UnicodeMessage` into a single function that takes two arguments, `bool ascii` and `string lang`. Lang can be null (or anything) if ascii is true. 

- [X] Changes message packets
- [X] Cleans up some code
- [X] Uses benchmarks to determine if the spanwriter + copyfrom

Projects/UOContent/Items/Containers/LockableContainer.cs

@@ -279,7 +279,7 @@ namespace Server.Items
                     inaccessible = true;
                 }
 
-                from.Send(new MessageLocalized(Serial, ItemID, MessageType.Regular, 0x3B2, 3, number, "", ""));
+                from.NetState.SendMessageLocalized(Serial, ItemID, MessageType.Regular, 0x3B2, 3, number);
             }
 
             return inaccessible;