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.Common/Session/IAriesSession.cs

@@ -0,0 +1,17 @@
+using FSO.Server.Common;
+
+namespace FSO.Server.Framework.Aries
+{
+    public interface IAriesSession : ISocketSession
+    {
+        bool IsAuthenticated { get; }
+        uint LastRecv { get; set; }
+        bool Connected { get; }
+
+        void Write(params object[] messages);
+        void Close();
+
+        object GetAttribute(string key);
+        void SetAttribute(string key, object value);
+    }
+}