Pt_PT translations

[harkadya]

Hello and thanks for Bonjourr! I've been using it for years and this is my way to contribute it to it. This is my first translation on github, so sorry if there's something wrong.

[victrme]

Thanks @harkadya !

There are a few more things to add:

• In langs.ts, you can add pt_PT next to pt_BR
• You should also add your name to the list of contributors in the Readme !

[harkadya]

Done and done!