Support `copy()` for `zipfile`

Feature or enhancement

Proposal:

Currently, copying an entry within a ZIP file is cumbersome due to the lack of support for simultaneous reading and writing. The implementer must either:

• Read the entire entry and write afterwards (which is memory-intensive and inefficient for large files), or
• Use a temporary file for buffered copying.

Both approaches are more complex and less performant, due to the need to decompress and recompress data.

It would be much more performant and friendly by implementing a copy() method, using the similar internal buffered copying technique introduced by #134627 with the internal _ZipRepacker.

This also opens the door to support an efficient move() operation, composed of copy(), remove(), and optionally repack().

Linked PRs

• gh-151825

Beginnen Sie damit, den Einstiegspunkt des zipfile-Moduls und den durch issue #134627 eingeführten internen Ansatz _ZipRepacker zu lesen. Die Änderung sollte effizientes Kopieren eines Eintrags ermöglichen, während das Archiv zum Lesen und Schreiben geöffnet ist, wobei Verhalten und Randfälle vor der Implementierung festgelegt werden. Der verknüpfte PR gh-151825 zeigt, dass die Arbeit bereits im Gange ist.