Removed NioTSO client and server

- NioTSO client isn't needed because we're using RayLib
- Added FreeSO's API server to handle most backend operations

server/FSO.Server.Protocol/Voltron/Packets/ClientByePDU.cs

@@ -0,0 +1,36 @@
+using Mina.Core.Buffer;
+using FSO.Common.Serialization;
+
+namespace FSO.Server.Protocol.Voltron.Packets
+{
+    public class ClientByePDU : AbstractVoltronPacket
+    {
+        public uint ReasonCode;
+        public string ReasonText;
+        public byte RequestTicket;
+
+        public override void Deserialize(IoBuffer input, ISerializationContext context)
+        {
+            this.ReasonCode = input.GetUInt32();
+            this.ReasonText = input.GetPascalString();
+            this.RequestTicket = input.Get();
+        }
+
+        public override VoltronPacketType GetPacketType()
+        {
+            return VoltronPacketType.ClientByePDU;
+        }
+
+        public override void Serialize(IoBuffer output, ISerializationContext context)
+        {
+            var text = ReasonText;
+            if(text == null){
+                text = "";
+            }
+            
+            output.PutUInt32(ReasonCode);
+            output.PutPascalString(text);
+            output.Put(RequestTicket);
+        }
+    }
+}