Fix Copy-DirectoryContent for proper nested directory handling

Changed from iterating Get-ChildItem to using Copy-Item with wildcard
This ensures proper recursive copying of all files and subdirectories

Before: Get-ChildItem | ForEach-Object { Copy-Item ... }
After: Copy-Item -Path "$Source\*" -Destination $Destination -Recurse

This prevents issues where nested directories aren't copied correctly.

Co-Authored-By: Claude <noreply@anthropic.com>

install-windows.ps1

@@ -260,10 +260,9 @@ function Copy-DirectoryContent {
             New-Item -Path $Destination -ItemType Directory -Force | Out-Null
         }
 
-        # Copy all items
-        Get-ChildItem -Path $Source -Force | ForEach-Object {
-            Copy-Item -Path $_.FullName -Destination $Destination -Recurse -Force -ErrorAction SilentlyContinue
-        }
+        # Copy all contents from source to destination
+        # Using -Container to properly handle nested directories
+        Copy-Item -Path "$Source\*" -Destination $Destination -Recurse -Force -ErrorAction SilentlyContinue
         return $true
     }
     return $false