Add PhotoTranscoder cleanup to Windows script

CleanPhotoCache-Windows.ps1

@@ -0,0 +1,33 @@
+param(
+    [Parameter(Mandatory)]
+    [String]$cacheDir,
+    [Int32]$cacheAge=30
+);
+
+$cutoff = (Get-Date).AddDays(-$cacheAge);
+$allFiles = 0;
+$oldFiles = 0;
+$freedBytes = 0;
+Get-ChildItem -Path $cacheDir -Recurse -File |
+where { $_.extension -in '.jpg','.jpeg','.png','.ppm' } |
+ForEach {
+    $allFiles++;
+    if ($_.LastWriteTime -lt $cutoff) {
+        $oldFiles++;
+        $freedBytes += $_.Length;
+        Remove-Item $_.FullName;
+    }
+};
+
+Write-Output $allFiles;
+Write-Output $oldFiles;
+
+if ($freedBytes -gt 1GB) {
+    Write-Output "$([math]::round($freedBytes / 1GB, 2)) GiB";
+} elseif ($freedBytes -gt 1MB) {
+    Write-Output "$([math]::round($freedBytes / 1MB, 2)) MiB";
+} elseif ($freedBytes -gt 1KB) {
+    Write-Output "$([math]::round($freedBytes / 1KB, 2)) KiB";
+} else {
+    Write-Output "$($freedBytes) bytes";
+}