[ENHANCEMENT] add support for pkpass files

[ulrich-mayer]

Is your feature request related to a problem? Please describe. I was not able to import flight tickets/car parking lot provided in pkpass format: https://en.m.wikipedia.org/wiki/PKPASS

Describe alternatives you've considered I was able to use the image I also received by mail, but not with the wallet.

I can provide a sample pkpass file, however github would not let me attach it.