+ asks user if they wanna create shortcut on desktop
+ asks user if they wanna start launcher after installation
+ added pkg for termux
+ added macos detection to launch sillytavern in seperate window
+ Uninstaller for sillytavern + extras
+ Changed conda env to extras (from sillytavernextras) to fit the docs
+ Improved backend menu functions (removes the elif mess)
+ Function to find a suitable terminal emulator when launching sillytavern or extras
+ Added tutorial on how to use it