重构项目，将项目拆分（临时提交）

DMS.WPF/Message/ReqMessage.cs

@@ -0,0 +1,13 @@
+using CommunityToolkit.Mvvm.Messaging.Messages;
+
+namespace DMS.Message;
+
+public class ReqMessage : RequestMessage<int>
+{
+    public ReqMessage(int count)
+    {
+        Count = count;
+    }
+
+    public int Count { get; set; }
+}