fix(Program.cs): add try-catch block to handle potential errors when getting the foreground process

DD2Switcher/Program.cs

@@ -246,11 +246,15 @@ namespace DD2Switcher {
         }
 
         private static void TabToPrevious() {
+            try {
                 var foreground = GetForegroundProcess();
                 if (!ProcessTracked(foreground.Id)) {
                     Console.WriteLine("Foreground process not tracked, skipping");
                     return;
                 }
+            } catch (Exception e) {
+                Console.WriteLine($"Error setting foreground window: {e}");
+            }
 
             if (lastWindows.Count == 0) {
                 Console.WriteLine("No previous window to switch to");