Add Ukrainian (ua) language translation

[afurm]

Summary

This PR adds complete Ukrainian (Українська) language support to the Ruby website.

What's Included

Configuration

• Added ua locale to _data/languages.yml with native name "Українська"
• Created _data/locales/ua.yml with full navigation and UI translations
• Created _data/locales/home/ua.yml with homepage-specific content

Translated Content (84 pages)

Section	Pages	Coverage
About	4	100%
Community	9	100%
Documentation	25	100%
Downloads	4	100%
Libraries	1	100%
Security	1	100%
Examples	4	100%
Conduct	1	100%
Privacy	1	100%
News	34	~7%

Major Translated Sections

• ✅ Complete homepage with hero section, features, and community highlights
• ✅ Full "About Ruby" page including philosophy and history
• ✅ Complete FAQ (11 parts)
• ✅ "Ruby in Twenty Minutes" tutorial (4 parts)
• ✅ "Ruby from Other Languages" (Python, Java, Perl, PHP, C/C++)
• ✅ Installation guides
• ✅ Community pages (mailing lists, user groups, conferences, etc.)
• ✅ Downloads section with mirrors and branches
• ✅ Code of Conduct and Privacy Policy

News Articles

Translated 34 news posts including:

• Ruby 3.4.0, 3.0.0, 2.7.0, 2.6.0, 2.5.0 release announcements
• Important "Separation of positional and keyword arguments in Ruby 3.0" article
• Various security advisories and patch releases

Screenshots

The translation has been tested locally and all pages render correctly with Ukrainian content.

Notes

• Some English text is intentionally kept:
  • "A Programmer's Best Friend" (brand tagline)
  • Book titles and proper nouns
  • Technical terms where appropriate

Checklist

• All pages tested and rendering correctly
• Navigation fully translated
• Homepage fully translated
• RSS feed configured
• 404 page translated

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Дякую! (Thank you!)

[ruslanlap]

Nice job, крута робота

[PivtoranisV]

Thanks a lot! In Ukraine many developers will be super happy

[AntonKolomiiets]

Yes, please do

[MrKirat]

Good job 👍

[denqxotl]

👍

[hsbt]

@afurm 👋 Thanks! I created www-ruby-lang-org-i18n-ua team and invite you to that team. Could you merge this by yourself?

If people in this PR would like to join the team and help, please ping me.

[afurm]

@afurm 👋 Thanks! I created www-ruby-lang-org-i18n-ua team and invite you to that team. Could you merge this by yourself?

If people in this PR would like to join the team and help, please ping me.

Thank you!

[ruslanlap]

Cool

[nitogel]

👍

[YaroslavPodorvanov]

Дякую!

[MrKirat]

Hi @hsbt !
I’m interested in joining the team. As a native Ukrainian speaker and an experienced Ruby developer, I believe I could be a valuable addition.