OSSystems / compress-tools-rs / 24838247186

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fix: auto-rewind source reader on seekable entry points

Callers previously had to manually `seek(SeekFrom::Start(0))` between
successive uses of the same reader (e.g. list_archive_files followed by
uncompress_archive_file), because libarchive only recognizes the archive
format from byte 0. Forgetting the rewind surfaced as an opaque
"unrecognized format" error.

Since the public entry points already require `Read + Seek`, rewind the
reader at the top of `run_with_archive` and `ArchiveIterator::new` so
reader reuse works out of the box.

Closes #117

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