Implement stage skipping

nksrv/LobbyServer/Msgs/Arena/ShowSpecialArenaReward.cs

@@ -0,0 +1,22 @@
+using nksrv.Utils;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace nksrv.LobbyServer.Msgs.Arena
+{
+    [PacketPath("/arena/special/showreward")]
+    public class ShowSpecialArenaReward : LobbyMsgHandler
+    {
+        protected override async Task HandleAsync()
+        {
+            var req = await ReadData<ReqShowSpecialArenaReward>();
+
+            var response = new ResShowSpecialArenaReward();
+            // TODO
+            await WriteDataAsync(response);
+        }
+    }
+}