Add Telegram bot integration for real-time alert notifications

- Implemented ITelegramNotificationService and TelegramNotificationService for sending alerts via Telegram.
- Updated MonitoringSettings to include Telegram configuration options.
- Enhanced AlertService to send alerts and resolutions through Telegram.
- Added API endpoints for checking Telegram status and sending test alerts.
- Updated README and TELEGRAM_SETUP.md with setup instructions and features.
- Included example configuration in appsettings.telegram.example.json.

Services/GameDetectionService.cs

@@ -154,8 +154,11 @@ namespace ResourceMonitorService.Services
                         return false;
 
                     // Get screen dimensions
-                    var screenWidth = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width;
-                    var screenHeight = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height;
+                    var primaryScreen = System.Windows.Forms.Screen.PrimaryScreen;
+                    if (primaryScreen == null)
+                        return false;
+                    var screenWidth = primaryScreen.Bounds.Width;
+                    var screenHeight = primaryScreen.Bounds.Height;
 
                     // Check if window covers the entire screen
                     var windowWidth = rect.Right - rect.Left;