colloid-gtk-theme: new tweak: everforest

lib.checkListOfEnum "${pname}: theme variants" [ "default" "purple" "pink" "red" "orange" "yellow" "green" "teal" "grey" "all" ] themeVariants

lib.checkListOfEnum "${pname}: color variants" [ "standard" "light" "dark" ] colorVariants

lib.checkListOfEnum "${pname}: size variants" [ "standard" "compact" ] sizeVariants

lib.checkListOfEnum "${pname}: tweaks" [ "nord" "dracula" "gruvbox" "all" "black" "rimless" "normal" "float" ] tweaks

lib.checkListOfEnum "${pname}: tweaks" [ "nord" "dracula" "gruvbox" "everforest" "all" "black" "rimless" "normal" "float" ] tweaks

stdenvNoCC.mkDerivation rec {

  inherit pname;