Feature Request - Unrar

I was wondering if it may be beneficial to anyone else to have an unrar feature in this project? It only comes up because I wrote a comic book reader and couldn't get my head around the code involved in porting unrar from kthoom (https://code.google.com/archive/p/kthoom). Just a suggestion and I would benefit from having that in the package. Thanks for all the hard work and great effort here.

Start by reviewing the requested unrar support and the referenced kthoom implementation to understand the porting scope. Identify how this project organizes file-format support and what integration point an unrar reader would use. Done means unrar archives are supported in the package with behavior verified against suitable archive examples.

Written by the indexing model from the issue text.