Modding Question: GUI Shortcuts

Can modding be done to add more GUI shortcuts? Like, let’s say I wanted someone to create a mod where, if you are holding a stack of items over an empty slot, you can right-click and it will drop a single item at a time. Is that possible? Or would that only be possible with a real update from the devs?

I’ve wanted a smoother GUI for so long, and I think there’s so much room for improvement. Specifically for inventory management. Minecraft (and by further extension, modded Minecraft) has some sweet keyboard shortcuts that incredibly improve inventory management. :heart:

I talk about some of them in this thread. If it’s possible to mod, would someone potentially do it?