add example 24 with a todo

ModExamples/24Websocket/WebsocketMessageHandler.cs

@@ -0,0 +1,23 @@
+using System.Net.WebSockets;
+using Core.Models.Utils;
+using Core.Servers.Ws.Message;
+
+namespace _24Websocket;
+
+public class WebsocketMessageHandler : ISptWebSocketMessageHandler
+{
+    private readonly ISptLogger<WebsocketMessageHandler> _logger;
+
+    public WebsocketMessageHandler(
+        ISptLogger<WebsocketMessageHandler> logger
+    )
+    {
+        _logger = logger;
+    }
+
+    public Task OnSptMessage(string sessionID, WebSocket client, byte[] rawData)
+    {
+        _logger.Info($"Custom SPT WebSocket Message handler received a message for {sessionID}: {rawData.ToString()}");
+        return Task.CompletedTask;
+    }
+}