Add Ukrainian translation

[Vovkiv]

Congrats on adding i18n support!

[Foldex]

Thanks for the TL!

Unfortunately while most of it does work, it seems like toasts and dialogs are unaffected:

Dialog

Toast

But looking through the po shows me that they clearly are present:

AdwSteamGtk/po/uk.po

Line 309 in 64b9708

msgid "New Release Downloaded: "

AdwSteamGtk/po/uk.po

Line 285 in 64b9708

msgid "This will reset all customizations made to the Steam client."

and code wise they are using gettext:

AdwSteamGtk/src/main.py

Line 143 in 321cd00

body=_("This will reset all customizations made to the Steam client."))

AdwSteamGtk/src/pages/window.py

Line 222 in 321cd00

t = Adw.Toast(title=_("New Release Downloaded: ") + msg, timeout=2)

Shrug. Gonna guess the issue is probably on my end, as I'm not that familiar with gettext's nuances.

I did just add a Translators Section to the credits though, so if you can sync up your branch and add in your info I'll go ahead and merge.

AdwSteamGtk/src/info.py.in

Line 33 in 321cd00

TRANSLATORS=[

[Vovkiv]

Yeah, i recently was translating another GTK + Adwaita program (https://gitlab.gnome.org/World/Upscaler/-/issues/24) and there was also issues with non-translated bits, despite them being clearly in po file. I think developer there still didn't catch all untranslated parts in code.