Added support for Hugo Multilingual Mode

[0lbap]

I added support for both English and French languages. I've followed Hugo's official documentation on multilingual mode closely to implement these changes. However, please feel free to review and provide feedback, as there's always a chance I might have overlooked something or made some typos.

More languages can be added in the config.toml file. The default language is set to English, and you can access the different languages with the URL (for example, the /about page is in English, but /fr/about page is in french).

Template text translation is done through the i18n function, which can be shorten by simply writing T. This uses the i18n/en.toml and i18n/fr.toml translation files (a list of key/value pairs). See this page for more information.

The content directory now contains two directories en and fr, in which the Markdown content is manually translated.

Here are some steps to add a new language :

1. Declare your new language in config.toml by adding it under the [languages] and defining the contentDir, languageCode, languageName and weight
2. Create your associated translation file (for example, i18n/fr.toml). You can use the English file as a base
3. Create your language content directory (for example, content/fr/). You can use the English directory as a base
4. Now you can start translating !

This marks my first open source contribution, and I'm eager to learn and improve.