[CLI] Don't write progress if output is redirected

FIxes #155

DiscordChatExporter.Cli/Internal/InlineProgress.cs

@@ -8,20 +8,32 @@ namespace DiscordChatExporter.Cli.Internal
         private readonly int _posY;
 
         public InlineProgress()
+        {
+            // If output is not redirected - save initial cursor position
+            if (!Console.IsOutputRedirected)
             {
                 _posX = Console.CursorLeft;
                 _posY = Console.CursorTop;
             }
+        }
 
         public void Report(double progress)
+        {
+            // If output is not redirected - reset cursor position and write progress
+            if (!Console.IsOutputRedirected)
             {
                 Console.SetCursorPosition(_posX, _posY);
                 Console.WriteLine($"{progress:P1}");
             }
+        }
 
         public void Dispose()
         {
+            // If output is not redirected - reset cursor position
+            if (!Console.IsOutputRedirected)
                 Console.SetCursorPosition(_posX, _posY);
+
+            // Inform about completion
             Console.WriteLine("Completed ✓");
         }
     }