add debug writes for viz

Author: ctacke

Source/v2/Meadow.CLI.Core/DFU/DfuUtils.cs

@@ -55,6 +55,7 @@ private static void FormatDfuOutput(string logLine, ILogger? logger, DfuFlashFor
         }
         else //Console out
         {
+            Debug.WriteLine(logLine);
             Console.Write(logLine);
 
             Console.Write(logLine.Contains("%") ? "\r" : "\r\n");

Source/v2/Meadow.CLI.Core/Firmware/FirmwareWriter.cs

@@ -1,6 +1,7 @@
 using Meadow.CLI.Core.Internals.Dfu;
 using Meadow.LibUsb;
 using Microsoft.Extensions.Logging;
+using System.Diagnostics;
 
 namespace MeadowCLI;
 
@@ -47,6 +48,8 @@ public async Task WriteOsWithDfu(string osFile, ILogger? logger = null, bool use
 
         var serialNumber = devices.First().GetDeviceSerialNumber();
 
+        Debug.WriteLine($"DFU Writing file {osFile}");
+
         await DfuUtils.FlashFile(
         osFile,
         serialNumber,