winpython@3.14.5.0: Fix extraction (Closes #8231)

Author: z-Fng

bucket/winpython.json

@@ -7,10 +7,18 @@
     "architecture": {
         "64bit": {
             "url": "https://sourceforge.net/projects/winpython/WinPython_3.14/3.14.5.0/WinPython64-3.14.5.0slim.7z",
-            "hash": "e54363cf3a0679bd75d4e345753304cac8f0be63d22b2bdfbcb238570b5786de",
-            "extract_dir": "WPy64-3.14.5.0"
+            "hash": "e54363cf3a0679bd75d4e345753304cac8f0be63d22b2bdfbcb238570b5786de"
         }
     },
+    "pre_install": [
+        "# Use a script to extract files since the extract_dir changes frequently.",
+        "$items = @(Get-ChildItem -Path $dir | Select-Object -First 2)",
+        "if ($items.Count -eq 1 -and $items[0].PSIsContainer) {",
+        "    $inner_dir = $items | ForEach-Object -MemberName FullName",
+        "    Move-Item -Path \"$inner_dir\\*\" -Destination $dir -Force",
+        "    Remove-Item -Path $inner_dir -Recurse -Force -ErrorAction Ignore",
+        "}"
+    ],
     "bin": [
         "scripts\\python.bat",
         [