Create sklmessages_bel_BY.properties

[vadimukr11]

This language pack adds Belarusian localization to SKLauncher, allowing you to navigate and use the launcher in your native Belarusian language. All menus, settings, and options are translated to provide a seamless and user-friendly experience for Belarusian speakers. Perfect for those who prefer to use their software in their native language or want to practice their Belarusian skills. Simple to install and fully integrated into SKLauncher, making your Minecraft experience more personalized and accessible.