Translation parity for Pubky/contacts supported languages

[piotr-iohk]

Problem or use case

Some Pubky profile/contact strings are still inconsistent across iOS and Android (different key names or wording), and recent parity updates need translation coverage.

Proposed solution

Keep this task focused and simple:

• provide translations for Pubky/contacts strings for all currently supported locales
• ensure iOS and Android keys/copy are aligned where parity is intended
• include any missing keys introduced by recent parity PRs

Supported locales (current app localization set):

• ar, ca, cs, de, el, es, es-419, fr, it, nl, pl, pt, pt-BR, ru

Alternatives considered

N/A

Additional context

N/A