[Feature request] Add brightness step / amount / % to lxqt-config-brightness 💡 #1150
Description
When I run lxqt-config-brightness -d or lxqt-config-brightness -i, the backlight brightness decreases or increases in very small steps - about 2% of the maximum brightness in my case.
When using these commands in keyboard shortcuts to adjust the display brightness, the adjustment feels extremely slow and requires pressing the keys many times to reach the desired level.
It would be great if lxqt-config-brightness supported an additional argument after -d or -i to specify the step size. For example, lxqt-config-brightness -d 10 could decrease brightness by 10%, while omitting the value would use the default step.