- added `Launcher.version` field that represents... current launcher version
- made `Git` class to work with git repositories;
made `Git.getTags()` method to list remove repository tags
- added outdated launcher version notification
- updated readme
- removed es-es locale because no one use it
- updated German, French and uwu languages
- fixed old launcher logs deletion
- added environmental variables manager
- fixed `Domain.getInfo()` method work in some specific cases(?)
- removed vi-vn locale because no one translate it
- added 6 new splash screen messages
- encoded file names for discord rpc icons
- made preparations for env manager
