Mesh: Workaround to load 3mf files not supported by zipios library

src/Ext/freecad/CMakeLists.txt

@@ -35,6 +35,7 @@ set(EXT_FILES
     sketcher.py
     UiTools.py
     utils.py
+    utils_zip.py
 )
 
 foreach (it ${EXT_FILES})

src/Ext/freecad/utils_zip.py

@@ -0,0 +1,18 @@
+# (c) 2024 Werner Mayer LGPL
+
+__author__ = "Werner Mayer"
+__url__ = "https://www.freecad.org"
+__doc__ = "Helper module to convert zip files"
+
+
+import zipfile
+
+def rewrite(source: str, target: str):
+    source_zip = zipfile.ZipFile(source, "r")
+    target_zip = zipfile.ZipFile(target, "w")
+
+    for name in source_zip.namelist():
+        target_zip.writestr(name, source_zip.open(name).read())
+
+    source_zip.close()
+    target_zip.close()