Pack Manifest
@Serializable
<packId>/assetdropkit.json: the pack's content version and the lowercase hex SHA-256 of each file, keyed by its path inside the pack. scripts/write-pack-manifest.py writes it at build time.
<packId>/assetdropkit.json: the pack's content version and the lowercase hex SHA-256 of each file, keyed by its path inside the pack. scripts/write-pack-manifest.py writes it at build time.