Added all the icons in case somebody will miss some;
Added "kill game process" button when launcher's behavior
is set to "Nothing" and the game is running
- classic style loads its background from "config's_tmp_path/background"
so from "launcher folder/background" by default
- icons will be changed in some future
- renamed "page_*" to some actual pages names
- added voice packages selection page
- made "Advanced" button working. It shows default paths selection page
- added gamescope support
- now gamemode option will not be clickabke if gamemode is not installed
- reworked enhancements page's events
- changed winesync env variables
- added `lib::is_available` function to check packages availability
- made preparations for environment settings
- now launcher hides when you launch the game
- now `Config::try_get_wine_executable` can return `Some("wine")`
- removed old wine and dxvk versions;
added new Wine-GE-Proton and GE-Proton builds
