Added persistent download queue with resume support

Implemented automatic saving and loading of the download queue, allowing users to resume unfinished downloads after restarting the application. Added methods to persist the queue state, prompting users to ask if they want to resume queued downloads on startup, and updated queue management logic to support resumed downloads

Utilities/SettingsManager.cs

@@ -149,6 +149,9 @@ namespace AndroidSideloader.Utilities
         public int SortColumn { get; set; } = 0;
         public bool SortAscending { get; set; } = true;
 
+        // Download queue persistence
+        public string[] QueuedGames { get; set; } = new string[0];
+
         private SettingsManager()
         {
             Load();
@@ -280,6 +283,7 @@ namespace AndroidSideloader.Utilities
             WindowMaximized = false;
             SortColumn = 0;
             SortAscending = true;
+            QueuedGames = new string[0];
 
             Save();
             Debug.WriteLine("Default settings created.");