Add support for tablets/stylus

**Circumstances**
I am using cachyos/hyprland on a convertible laptop. When i use the device in tablet mode (lid opened folded 360°) i cannot access the mouse pad and i do not always have a mouse at hand. So i would like to use my stylus to select the screenshot area and copy it to rnote.
I use slurp as part of grimblast, but the problem applies to every tool that uses slurp.

**Problem**
The stylus does not work for selecting the screenshot area.
It works fine though for note taking and selecting text.

**Solution**
Please add support for styluses.

I have yet to find a selection tool that works with the stylus. I use my finger (touchscreen) or a mouse as workaround.