Translation: add Ukrainian language

[MattMsh]

Hi! I listed all the translations and didn't found ukrainian here. Could we add it? It would be very useful for ukrainian developers and other people.

[r0qs]

Hi, sure, we can add it, but we would need someone to handle the translations. Are you interested in maintaining the repository?

[MattMsh]

Great! Yes, I'm interested in maintaining repository in my native language!