mapper class and delete old stuff

Gameboard.ShogiUI.Sockets.ServiceModels/Types/SessionMetadata.cs

@@ -0,0 +1,12 @@
+namespace Gameboard.ShogiUI.Sockets.ServiceModels.Types
+{
+	public class SessionMetadata
+	{
+		public string Name { get; set; }
+		public string Player1 { get; set; }
+		public string? Player2 { get; set; }
+		public bool IsPrivate { get; set; }
+
+		public string[] Players => string.IsNullOrEmpty(Player2) ? new[] { Player1 } : new[] { Player1, Player2 };
+	}
+}