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/Server/Network/Packets/OutgoingEquipmentPackets.cs

@@ -36,11 +36,7 @@ namespace Server.Network
     {
         public static void SendDisplayEquipmentInfo(
             this NetState ns,
-            Serial serial,
-            int number,
-            string crafterName,
-            bool unidentified,
-            List<EquipInfoAttribute> attrs
+            Serial serial, int number, string crafterName, bool unidentified, List<EquipInfoAttribute> attrs
         )
         {
             if (ns == null || !ns.GetSendBuffer(out var buffer))