Feat/add translate option to main

[egalvis27]

What is Changed / Added

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• Added i18next support in the Electron Main process.
• Implemented a Main i18n service that reuses existing Renderer locale JSON files (no duplicated translations).
• Initialized Main i18n during app startup with the stored preferedLanguage.
• Updated Tray menu labels and tooltip messages to use translated keys instead of hardcoded strings.
• Added reactive Tray translation refresh when language changes.
• Added language synchronization from Renderer to Main through IPC.
• Exposed the language update API in preload and updated corresponding typings.
• Added Main Tray translation keys to:
  • en.json
  • es.json
  • fr.json
• Removed unnecessary translation wrapper in tray-menu.ts and used translateMain directly.

Why

• Main process UI elements (Tray menu and tooltip) were still hardcoded in English, while Renderer already supported i18n.
• This caused inconsistent language behavior across the application.
• Reusing the same locale files ensures a single source of truth for translations.
• Syncing language updates from Renderer to Main ensures Tray text updates immediately after users change language in settings.
• Reduces maintenance cost and prevents future translation drift between Main and Renderer.

[sonarqubecloud]

Quality Gate failed

Failed conditions
22.7% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud