[Enhancement request] allow to put whowl downloaded ZIP files to heimdall

[Mannshoch]

I use Heimdall around all 3 Years, then when I change the Phone.
Every time I have to study, pages and pages to find out how to get it work.
I Propose following enhancements to heimdall-frontend:

• Add possibility to add open a zip File in Heimdall.
  Heimdall proceed and unpack the files and get ready to flash
  • Add possibility to load LineageOS zip files
  • Add Possibility to load Firmware files from Sammobile
• Add Possibility to point a Directory with .tar.md5 files and automatically load them.
• Add Possibility to brows to an .img file and load it.

If needed ask questions.