Adds support for internationalization and updates configuration files.

[danfmsouza]

Vue I18n Implementation

As asked by @GyufiThePenguin in the issue #351 (now is a feature request). I tried to implement a simple UI internationalization. It still no t affecting .ts files, but the interface was almost 90% translated.

The internationalization was implemented using Vue I18n in the following steps:

1. Initial Setup

• Added VueI18n configuration in the i18n.js file
• Imported locale files from the locales directory

2. Language Detection Created a detectBrowserLocale() function that:

• Gets available locales from messages
• Detects browser language
• Falls back to 'en' if browser language is not supported

3. Locale Configuration Set up supported languages:

messages: {
  'en': messages.en, // Default
  'pt': messages.pt, 
  'es': messages.es,
  'fr': messages.fr
}

4. Translation Structure

• Created JSON files for each language in the locales directory
• Organized translations using nested objects with unique keys
• Set up en_US.json as the base translation file

5. Integration

• Added Vue I18n script in head.html
• Set up locale imports in index.js
• Configured fallback locale as 'en' for missing translations

This implementation allows the application to:

• Automatically detect user's browser language
• Support multiple languages (EN, PT, ES, FR)
• Fallback to English when a translation is missing
• Maintain organized translation files per language