[REQ] Add support for extracting Debian packages (.deb)

### Is your feature request related to a problem? Please describe
I often work with .deb files and they just appear as the white-page-unkown-file-type-placeholder icon in the Finder.

### Describe the solution you'd like
.deb files are just compressed archives with a well-defined layout. I would like to have a nice file icon when Keka is registered as the default uncompressor and for Keka to completely decompress .deb files so I can inspect if the file layout/contents are correct.

### Describe alternatives you've considered
I use tools on the command line to achieve the desired effect, but double-clicking the file in the Finder and Keka decompressing all the nested archives in one go would save time.

### Additional context