Change whether touchpad is disabled while typing based on active window

[m-bartlett]

Describe the feature

Add a new windowrule that would allow either explicit disabling or enabling of the touchpad while typing when a window matching that rule is focused.

For example:

windowrule = touchpadwhiletyping true, class:org.inkscape.Inkscape
windowrule = touchpadwhiletyping false, class:codium

Regardless of the global option input:touchpad:disable_while_typing, the top line would make it so when inkscape is my active window, the touchpad is enabled while typing and hence I can use the spacebar+touchpad to pan. The bottom line would make it so the touchpad is disabled while typing when codium is the active window.

Why would it be beneficial

input:touchpad:disable_while_typing is a good feature for me as my laptop has a comparatively large touchpad that is easy to accidentally bump while typing. However, there are many specific applications where I would like to disable this feature while the application is active/focused. For example, many graphics editing software lets one pan by holding down the spacebar and moving the cursor. This functionality is disable while disable_while_typing is enabled since holding the spacebar counts as typing.

I can imagine a manual fix for this situation by writing a custom daemon that listens on the Hyprland socket for window focus events and toggling the disable-while-typing setting accordingly. I think integrating this feature natively would make it more accessible and less of a kludge.