Log output after saving bitmap

Add output message after saving bitmap in PowerShell script.

src/tools/ssd.mjs

@@ -45,6 +45,7 @@ async function takeScreenshot(filename) {
     $graphic = [System.Drawing.Graphics]::FromImage($bitmap);
     $graphic.CopyFromScreen($Screen.Left, $Screen.Top, 0, 0, $bitmap.Size);
     $bitmap.Save('${fullPath}');
+    Write-Output "Wrote ${fullPath}"
   `;
   
   try {