重构项目，将项目拆分（临时提交）

DMS.WPF/Message/LoadMessage.cs

@@ -0,0 +1,13 @@
+using CommunityToolkit.Mvvm.Messaging.Messages;
+using DMS.Core.Enums;
+
+namespace DMS.Message;
+
+public class LoadMessage:ValueChangedMessage<LoadTypes>
+{
+    public LoadTypes LoadType { get; set; }
+    public LoadMessage(LoadTypes types) : base(types)
+    {
+        LoadType=types;
+    }
+}