Unarchive equivalent in v4

[tomcruise81]

What would you like to have changed?

A default Unarchive function that operates similarly to https://pkg.go.dev/github.com/mholt/archiver#Unarchive that either:

• Could be passed into extractor.Extract(...) as the `FileHandler function
• Or is it's own interface on a given Format

Why is this feature a useful, necessary, and/or important addition to this project?

It would extend the feature set from v3 to v4, while still offering contextual awareness

What alternatives are there, or what are you doing in the meantime to work around the lack of this feature?

1. Sticking with v3 / without contextual awareness
2. Implementing all the unachriving logic ourselves in a FileHandler function

[mholt]

Thanks; this is a duplicate of #311. Feel free to continue discussion there!

[tomcruise81]

Sorry about that,