Add example to enable touchpad while typing (#4075)

Useful for games!

config/hypr/input.conf

@@ -25,6 +25,9 @@ input {
     # Control the speed of your scrolling
     scroll_factor = 0.4
 
+    # Enable the touchpad while typing
+    # disable_while_typing = false
+
     # Left-click-and-drag with three fingers
     # drag_3fg = 1
   }