Add stream context metadata options for compress.zlib:// protocol wrapper so that original mtime and name can be given

Description

Currently, when writing to a gz file using the compress.zlib:// protocol wrapper it is not possible to pass the mtime or name of the original file. It would be nice if we could do so without having to reopen the gzip file in write mode for write the metadata directly into it as in this bug report https://bugs.php.net/bug.php?id=46577
I believe that this can be done by adding new stream context options for zlib (similar to those for phar). See https://www.php.net/manual/en/context.php

The gzip file format supports the following meta data:

• compression method
• itype (text or binary)
• mtime (nice to have)
• size (thankfully set by compress.zlib:// )
• os
• original file name (nice to have)
• comment

Inizia ispezionando il wrapper del protocollo compress.zlib:// e la gestione delle relative opzioni di contesto dello stream, quindi confronta le opzioni di contesto phar esistenti citate nell’issue. Determina come mtime e il nome del file originale debbano essere passati ai metadati gzip e verifica che la scrittura tramite il wrapper preservi entrambi i valori senza riaprire il file.