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/Misc/PowerGenerator.cs

@@ -216,18 +216,18 @@ namespace Server.Items
 
         public void DoDamage(Mobile to)
         {
-            to.Send(
-                new UnicodeMessage(
-                    Serial,
-                    ItemID,
-                    MessageType.Regular,
-                    0x3B2,
-                    3,
-                    "",
-                    "",
-                    "The generator shoots an arc of electricity at you!"
-                )
+            to.NetState.SendMessage(
+                Serial,
+                ItemID,
+                MessageType.Regular,
+                0x3B2,
+                3,
+                false,
+                "ENU",
+                "",
+                "The generator shoots an arc of electricity at you!"
             );
+
             to.BoltEffect(0);
             to.LocalOverheadMessage(MessageType.Regular, 0xC9, true, "* Your body convulses from electric shock *");
             to.NonlocalOverheadMessage(MessageType.Regular, 0xC9, true, $"* {to.Name} spasms from electric shock *");