Obtaining metadata on entries without needing mutable references to ZipArchive

[kipcode66]

Is your feature request related to a problem? Please describe.
I wish to look if a certain path in the zip exists, and if it is a directory or not. I would need to be able to get that metadata from a &ZipArchive<R>, but I can only get the info on if it is a directory by using obtaining a mutable instance of a ZipFile with ZipArchive<R>::by_*(&mut self, ...) even if I only want to get some information on the file. And since I don't have a mutable reference available, I can't get the metadata I need.

Describe the solution you'd like
I wish I could access the metadata from a zip archive/internal entry (file/directory) without requiring a mutable reference.

Describe alternatives you've considered
As mentioned above, the only way to get the information about a file metadata required to get a mutable reference of the archive, which since I need to iterate through directories, I need to be able to use an immutable reference.

Additional context
This repository is the repo which I have the problem on. More specifically, here.