refactor and chat base

Room/Chat/ChatOutput.cs

@@ -0,0 +1,18 @@
+namespace MauMau_Server.Mau;
+
+public class ChatOutput
+{
+    public string Playername { get; set; }
+    public string Message { get; set; }
+    
+    public ChatOutput(string playername, string message)
+    {
+        Playername = playername;
+        Message = message;
+    }
+    
+    public ChatOutput()
+    {
+        
+    }
+}