add cursor trail animations

home/programs/kitty/default.nix

@@ -22,6 +22,8 @@
       url_style = "curly";
       cursor_shape = "Underline";
       cursor_underline_thickness = 3;
+      cursor_trail = 3;
+      cursor_trail_decay = "0.1 0.4";
       window_padding_width = 10;
     };
   };