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/Gluon/Packets/CityNotify.cs

@@ -0,0 +1,45 @@
+using FSO.Common.Serialization;
+using Mina.Core.Buffer;
+
+// Task -> City notifications.
+
+namespace FSO.Server.Protocol.Gluon.Packets
+{
+    public class CityNotify : AbstractGluonPacket
+    {
+        public CityNotifyType Mode;
+        public uint Value;
+        public string Message = "";
+
+        public CityNotify() { }
+
+        public CityNotify(CityNotifyType mode)
+        {
+            Mode = mode;
+        }
+
+        public override void Deserialize(IoBuffer input, ISerializationContext context)
+        {
+            Mode = input.GetEnum<CityNotifyType>();
+            Value = input.GetUInt32();
+            Message = input.GetPascalVLCString();
+        }
+
+        public override GluonPacketType GetPacketType()
+        {
+            return GluonPacketType.CityNotify;
+        }
+
+        public override void Serialize(IoBuffer output, ISerializationContext context)
+        {
+            output.PutEnum(Mode);
+            output.PutUInt32(Value);
+            output.PutPascalVLCString(Message);
+        }
+    }
+
+    public enum CityNotifyType : byte
+    {
+        NhoodUpdate = 1
+    }
+}