更改了菜单点击导航模式，新增了设备详情页

ViewModels/DeviceDetailViewModel.cs

@@ -0,0 +1,9 @@
+namespace PMSWPF.ViewModels;
+
+public class DeviceDetailViewModel:ViewModelBase
+{
+    public override void OnLoaded()
+    {
+        
+    }
+}

ViewModels/VariableTableViewModel.cs

@@ -1,7 +1,12 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using PMSWPF.Models;
+
 namespace PMSWPF.ViewModels;
 
-public class VariableTableViewModel : ViewModelBase
+partial class VariableTableViewModel : ViewModelBase
 {
+    [ObservableProperty]
+    private VariableTable variableTable;
     public override void OnLoaded()
     {
     }