Implement Localization (Multi-language Support)

[albardoo02]

Description

Implement localization (l10n) support to allow the plugin to display messages in multiple languages based on the configuration or user settings.

Todo

• Create language files (e.g., en_US.yml, ja_JP.yml).
• Implement a language management class (e.g., LocaleManager) to handle message loading and formatting.
• Replace all hardcoded message strings in the codebase with localized string keys.
• Add a default language option (e.g., locale: en_US) to the main config.yml.

Additional Context

• Provide default translations for Japanese (ja_JP) and English (en_US).