feat.在线安装器，更好的Issue与pull request模板。

LanDesktopPLONDS.installer/ViewModels/InstallerStepViewModel.cs

@@ -0,0 +1,22 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using LanDesktopPLONDS.Installer.Models;
+
+namespace LanDesktopPLONDS.Installer.ViewModels;
+
+public sealed partial class InstallerStepViewModel(
+    InstallerStepId stepId,
+    string title,
+    string iconKey) : ObservableObject
+{
+    [ObservableProperty]
+    private bool _isUnlocked;
+
+    [ObservableProperty]
+    private bool _isSelected;
+
+    public InstallerStepId StepId { get; } = stepId;
+
+    public string Title { get; } = title;
+
+    public string IconKey { get; } = iconKey;
+}