Direct people to a separate tool to "freeze" the screen

[faergeek]

I was looking for a way to "freeze" the screen before selecting a region via slurp and taking a screenshot via grim (similar to what's wanted in #170, #104 and #100, for example). It's understandable that it's out-of-scope for slurp.

I saw that some people use hyprpicker to achieve that, but it requires keeping track of a pid to kill afterwards and things like that, which can be tricky and breaks far too easily. So I wrote a little tool that does just the "freezing" part and integrates nicely with slurp and grim. It works like this:

still -c 'slurp | grim -g- -' # -p can be added to also overlay a cursor on top

It will take a screenshot of every output (in reality I only have one monitor, so I wasn't able to test it with multiple) and overlay it on top via a layer-shell protocol. It exits when slurp | grim -g- - exits. It's just what I needed. Maybe other people will find it useful.

Just to be clear, at the moment it's age is less than 24 hours, it's only present in AUR and requires a pretty recent version of meson and C23. Also I don't really write C very much and just finished reading the wayland book to understand how it all fits together.

Given all that would it make sense to recommend this tool in slurp's README?