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.Database/DA/AuthTickets/IAuthTickets.cs

@@ -0,0 +1,10 @@
+namespace FSO.Server.Database.DA.AuthTickets
+{
+    public interface IAuthTickets
+    {
+        void Create(AuthTicket ticket);
+        AuthTicket Get(string id);
+        void Delete(string id);
+        void Purge(uint time);
+    }
+}