Add pinned launcher items

Models/LauncherConfig.cs

@@ -25,6 +25,8 @@ public sealed class LauncherItem
 
     public string? IconPath { get; set; }
 
+    public bool IsFavorite { get; set; }
+
     public LauncherDisplayMode DisplayMode { get; set; } = LauncherDisplayMode.CompactList;
 
     public List<LauncherItem> Children { get; set; } = [];