feat(uk): add Ukrainian locale pack

[digitalby]

Adds a uk locale pack with masculine and feminine styles covering traditional, poetic, and church-register Ukrainian names.

• Given names from Slavic-root, ecclesiastical, and folk tradition (Святослав, Ярослав, Оксана, Роксолана, …)
• Surnames predominantly in the characteristic Ukrainian -енко / -ченко patronymic form, alongside historical and folk surnames
• Many Ukrainian surnames are gender-invariant in form (e.g. Шевченко, Франко); the pack reflects this accurately
• Descriptions in Ukrainian

Closes #5