Add textproc/py-transpopy: Translate PO file strings with Google Translate API

Transpopy uses the Google Translate API to convert/translate strings from a
PO (gettext Portable Object) file, keeping your lines or fuzzy references.

To use the Google Translate API it's needed an API key in json format.

WWW: https://github.com/kanazux/transpopy

PR: 230964
Submitted by: Silvio Ap Silva <contato@kanazuchi.com>