feat: Add Print Service Tray application with configuration and queue management

- Implemented PrintQueueService with job counting and snapshot retrieval.
- Created Form1 as the main entry point for the tray application.
- Developed ConfigurationForm for managing printer configurations and document types.
- Added models for printer configuration, queue status requests, and responses.
- Established ConfigurationService for loading and saving printer configurations.
- Introduced ServiceClient for IPC communication with the print service.
- Built TrayApplicationContext for managing the system tray icon and status updates.
- Added TODO.md for tracking remaining work and future enhancements.

PrintService/Services/PrintQueueService.cs

@@ -59,6 +59,14 @@ public class PrintQueueService
     /// </summary>
     public int Count => _queue.Count;
 
+    /// <summary>
+    /// Get all jobs in the queue (snapshot)
+    /// </summary>
+    public PrintJob[] GetAllJobs()
+    {
+        return _queue.ToArray();
+    }
+
     /// <summary>
     /// Save queue state to disk
     /// </summary>