[FIX] Improve translation keys for az, and ru

[martian56]

This pull request significantly updates the landing page UI and internationalization files to improve the onboarding and marketing experience for users in English, Russian, and Azerbaijani. The changes introduce a new step-by-step "How it works" section, a clear list of product capabilities, and a more prominent call-to-action, all with subtle fade-in animations. The i18n files are also updated to support the new content and improve translation quality and consistency.

Landing Page Redesign and Animation:

• Introduced a new FadeSection component using the new useInView hook to animate landing page sections as they enter the viewport, enhancing the user experience with smooth fade-in effects. (apps/frontend/src/hooks/useInView.ts, apps/frontend/src/pages/Landing/LandingPage.tsx) [1] [2]
• Replaced the old "Features" section with a new, clearer "How it works" step-by-step guide and a "What you can do" capabilities grid, both using the new fade-in animation. Also added a prominent call-to-action section at the bottom of the landing page. (apps/frontend/src/pages/Landing/LandingPage.tsx)

Internationalization and Content Updates:

• Updated English (en.json), Russian (ru.json), and Azerbaijani (az.json) locale files to add translations for the new sections, improve clarity, and ensure consistency with the new landing page design. This includes new keys for "how it works," "capabilities," and call-to-action, and improved/rewritten many existing translations for accuracy and tone. [1] [2] [3] [4] [5]

General Improvements:

• Refactored the landing page code for better readability and maintainability, such as extracting the animated section logic and updating class names for consistency. (apps/frontend/src/pages/Landing/LandingPage.tsx) [1] [2]

These changes collectively modernize the landing page, making it more engaging and informative for new users, and ensure that the experience is high-quality across supported languages.

Closes #9

[nazarli-shabnam]

good job