refactor and chat base

Websockets/WebsocketManager.cs

@@ -0,0 +1,22 @@
+using System.Net.WebSockets;
+using System.Text;
+
+namespace MauMau_Server.Websockets;
+
+public static class WebsocketManager
+{
+    public static void SendAsync(WebSocket socket, string message)
+    {
+        var bytes = Encoding.Default.GetBytes(message);
+        var arraySegment = new ArraySegment<byte>(bytes);
+        socket.SendAsync(arraySegment, WebSocketMessageType.Text, true, CancellationToken.None);
+    }
+    
+    public static void BroadcastAsync(List<WebSocket> sockets, string message)
+    {
+        foreach (var socket in sockets)
+        {
+            SendAsync(socket, message);
+        }
+    }
+}