Add Ukrainian localization

[technix]

Description

Add Ukrainian localization.

Credit

[X] I would like to be credited in the application as: Serhii Mozhaiskyi

Presubmission Checklist

[X] I have read this project's CONTRIBUTING file and this PR follows the criteria laid out there.
[X] This contribution was created by me and I have the right to submit it under the GPL v3 license. (This is not a rights assignment.)
[X] I have read and agree to abide by this project's Code of Conduct.

[klembot]

👍 🇺🇦

I will add this to the next release GitHub project soon.