[FEATURE REQUEST] .pkpass support

[Kasi07]

Is your feature request related to a problem? Please describe.
I would like to be able to add .pkpass files as Cards.
This could for example be a club membership card or even flight tickets etc.
This would allow many cards to be added as this is the standard used by apple wallet. So if somewhere one sees the apple wallet button, one can simply click this and a .pkpass file gets downloaded.

Describe the solution you'd like
A .pkpass file could be imported.

Describe alternatives you've considered
There really isn't any alternative way to import some cards which are provided only for apple and google wallet.

Additional context
Catima just added support for pkpass files, see their issue here: CatimaLoyalty/Android#48