refactor and chat base

Room/MessageDTO.cs

@@ -0,0 +1,18 @@
+namespace MauMau_Server.Mau;
+
+public class MessageDTO
+{
+    public string Type { get; set; }
+    public string Payload { get; set; }
+    
+    public MessageDTO(string type, string payload)
+    {
+        Type = type;
+        Payload = payload;
+    }
+    
+    public MessageDTO()
+    {
+        
+    }
+}