Translate Russian localization strings

[karinakbataeva]

Feature Preview

This PR adds Russian (ru-RU) localization support for AppFlowy.

Users can now select Russian as an interface language across supported platforms.

No functional code changes were introduced; only localization additions.

fixes #8840

Summary by Sourcery

New Features:

• Provide Russian (ru-RU) as a localizable interface language via updated translation resources.

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[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds and updates Russian (ru-RU) localization strings for the AppFlowy frontend without changing functional code.

File-Level Changes

Change	Details	Files
Introduce and refine Russian localization entries.	Add missing Russian translations for existing UI keys Update existing Russian strings for accuracy, consistency, and tone Align ru-RU keys and structure with other locale files to maintain parity	frontend/resources/translations/ru-RU.json

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[github-actions]

🥷 Ninja i18n – 🛎️ Translations need to be updated

Project /project.inlang

lint rule	new reports	level	link
Message without source	1	warning	contribute (via Fink 🐦)
Missing translation	30	warning	contribute (via Fink 🐦)

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