Add Polish language

[BilalHassona]

Assalamu alaykum, I would like to add Polish langugage translations in the iOS app just as I did for the Android and front-end apps (not merged yet) (Android: quran/quran_android#2761, Front-end: quran/quran.com-frontend-next#2120). I am native Polish speaker and fluent in English (Level C1/C2). Would that be accepted and merged? I am mid/senior front-end dev - I don't know much about Android/iOS development but I plan to use this old issue and translate the file mentioned there: #456. If there are other files I should translate or I need to connect the new language to the app somehow, please let me know.