Label translations support

[mikhaillopandia]

Hi team! It would be great to have out of the box functionality for generating label translations. (/{locale}.lproj/pass.strings) I was debugging why ExampleStoreCard doesn't have labels under the values, looks like this is the reason.

[mikhaillopandia]

upd: labels visibility is not related to translations, but this feature is nice to have

Passkit::BasePass
    def background_color
      "rgb(255, 255, 255)"
    end

    def label_color
      "rgb(255, 255, 255)"
    end

[coorasse]

This should be closed now