Add support for multiple languages with configurable translations. Updated README with configuration instructions

[tubby1981]

Translations

mokey supports multiple languages for its interface and email templates.

To configure translations:

1. Place translation files in /etc/mokey/translations/. For example:

• english.toml for English translations
• dutch.toml for Dutch translations

2. Update the configuration file /etc/mokey/mokey.toml with the following options:

#Default language for the site #Languages supported: English (english), Dutch (dutch) #Default is english default_language = "dutch"

#Directory where translations can be placed translations_dir = "/etc/mokey/translations"`

Users can translate mokey into their own language by creating a new .toml file in the translations_dir and referencing it in the default_language configuration. This allows for complete customization of the interface and email templates in the preferred language.