refactor:将所有的ItemViewMdoel的名字删除ViewModel，并将命名空间调整为DMS.WPF.ItemViewModel.

DMS.WPF/ItemViewModel/MqttAliasItem.cs

@@ -0,0 +1,27 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using DMS.Application.DTOs;
+
+namespace DMS.WPF.ItemViewModel;
+
+public partial class MqttAliasItem : ObservableObject
+{
+    public int Id { get; set; }
+
+    [ObservableProperty]
+    private int _variableId;
+
+    [ObservableProperty]
+    private int _mqttServerId;
+
+    [ObservableProperty]
+    private string _mqttServerName;
+
+    [ObservableProperty]
+    private string _alias;
+    
+    [ObservableProperty]
+    private MqttServerItem _mqttServer;
+    
+    [ObservableProperty]
+    private VariableItem _variable;
+}