Read NDJSON lines from `reader` and display pull progress. Handles two modes: - **Modern podman** (5.9+, with `pullProgress` support): per-blob byte-level progress bars via indicatif - **Older podman** (5.x): shows status messages from the `stream` field ("Copying blob ...", "Writing manifest ...") as a live spinner
(reader: &mut (impl AsyncBufReadExt + Unpin))
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