Ukrainian translation added (uk.po)

[Oleghishak]

I have created a Ukrainian translation for the project. Please find it attached below.

youtube_dl_gui.ukr.txt

[axcore]

This project was abandoned a few years ago.

[Oleghishak]

Thank you for your feedback

[axcore]

There is a list of alternatives here https://www.reddit.com/r/youtubedl/wiki/info-guis/