Idea: use `audiotags` crate

[ErichDonGubler]

A fair amount of functionality in this crate is dedicated to extracting audio metadata. A recent announcement on Reddit for the audiotags crate, though, might mean that a lot of this logic can be outsourced to that crate, instead of having to reinvent a wheel here.

Thoughts? :)

[quebin31]

Looks interesting, I'll take a look at the audiotags crate, some time ago I was also thinking in moving metadata extraction to a separate crate.

Thank you for the suggestion!