Add support for rendering Apple Wallet boarding passes

Summary:
This covers showing boarding pass fields, styling, translations and
barcodes from the pkpass files. Good enough to get a quick overview of
your flight data, for actually getting into an aircraft KF5::Prison
is still missing support for the widely-used Aztec code though.

Reviewers: #kde_pim, knauss

Reviewed By: #kde_pim, knauss

Subscribers: knauss

Tags: #kde_pim

Differential Revision: https://phabricator.kde.org/D8395