[FEATURE] Implement Core Internationalization (i18n) Infrastructure

Is your feature request related to a problem? Please describe.

The application currently only supports English and lacks internationalization capabilities. This limits accessibility for non-English speaking users and prevents expansion into international markets.

Describe the solution you'd like

Implement core internationalization infrastructure:

  1. i18n Setup:
  • Set up @nuxtjs/i18n module integration
  • Create translation file structure in the project
  • Implement translation key management system
  • Add type safety for translation keys
  1. Base Language Support:
  • Add English as the base language
  • Structure translation files using JSON or YAML
  • Include translations for all UI elements and error messages
  1. Language Switching:
  • Add language selector in the site header
  • Persist language preference in local storage
  • Auto-detect user's preferred language
  • Handle language switching without page reload

Describe alternatives you've considered

  1. Browser-based translation only
  2. Separate deployments for different languages
  3. Using a third-party translation service API

Additional context

  • Will need to modify the existing UI components in app/components/
  • Should integrate with current Nuxt UI theming system
  • Must maintain type safety with the existing TypeScript setup
  • Will require updates to the build process in nuxt.config.ts