[Request]: `EXT4Unpacker(blockSizeInBytes:)` parameter name is misleading.

[jglogan]

Feature or enhancement request details

The parameter doesn't represent the block size; today, EXT4Unpacker does not have any block size configuration.

The parameter should be named capacityInBytes, or something else that describes its actual purpose.

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[adityabagchi24]

@jglogan I have made the changes in my PR #789. Please have a look.