[Feature] PDF Attachments

Problem Statement

I have a use case where I am trying to read embedded pdf attachments (I don't need the raw bytes, but I think they can be exposed). Similar to how https://pikepdf.readthedocs.io/en/latest/topics/attachments.html#general-notes-on-attached-files handles it

Proposed Solution

I don't need it in the parse, so potentially a method on parser ie

parser = LiteParse()
attachments = parser.get_attachments('doc.pdf')

Alternatives Considered

No response

Additional Context

If AI assisted contributions are accepted I would be willing to work on this