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.

PrintServiceTray/Services/ServiceClient.cs

@@ -0,0 +1,62 @@
+using System.IO.Pipes;
+using System.Text;
+using System.Text.Json;
+using PrintServiceTray.Models;
+
+namespace PrintServiceTray.Services;
+
+public class ServiceClient
+{
+    private readonly string _pipeName;
+    private readonly int _timeout;
+
+    public ServiceClient(string pipeName = "PrintServicePipe", int timeoutMs = 5000)
+    {
+        _pipeName = pipeName;
+        _timeout = timeoutMs;
+    }
+
+    public async Task<QueueStatusResponse> GetQueueStatusAsync()
+    {
+        try
+        {
+            using var pipe = new NamedPipeClientStream(".", _pipeName, PipeDirection.InOut);
+            await pipe.ConnectAsync(_timeout);
+
+            var request = new QueueStatusRequest();
+            var requestJson = JsonSerializer.Serialize(request);
+            var requestBytes = Encoding.UTF8.GetBytes(requestJson);
+
+            await pipe.WriteAsync(requestBytes);
+            await pipe.FlushAsync();
+
+            var buffer = new byte[4096];
+            var bytesRead = await pipe.ReadAsync(buffer);
+            var responseJson = Encoding.UTF8.GetString(buffer, 0, bytesRead);
+
+            var response = JsonSerializer.Deserialize<QueueStatusResponse>(responseJson);
+            return response ?? new QueueStatusResponse { Success = false, Message = "Invalid response" };
+        }
+        catch (TimeoutException)
+        {
+            return new QueueStatusResponse { Success = false, Message = "Service not responding" };
+        }
+        catch (Exception ex)
+        {
+            return new QueueStatusResponse { Success = false, Message = $"Error: {ex.Message}" };
+        }
+    }
+
+    public async Task<bool> IsServiceRunningAsync()
+    {
+        try
+        {
+            var response = await GetQueueStatusAsync();
+            return response.Success;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+}