Feasability of a mod that adds a dedicated "empty hand" slot so players effectively have a way to always holster everything?

[Tapeworm]

To elaborate a bit, it would essentially be two new toolbar slots, that rejects any and all items and will ALWAYS remain empty, and is tied to its own custom keybind to swap to (similar to the keybind for offhand). So for example, you could press V and you'd switch to this new toolbar slot (which may or may not even be visible on the toolbar. No real need to waste UI space for a slot that will always be empty imo). It will always be empty, so you're essentially pressing V to switch to unarmed. Could then have a second "hidden" toolbar slot and tie that to something like shift+V to allow the same behavior but for offhand items specifically, though I'm not sure if that one would be more or less complex.

 

I'm curious about how possible this all is. I know there's a mod that does something similar, the name escapes me, but it adds a hotkey to transfer the currently active toolbar slot item to your "mouse toolbar slot", which is the hidden toolbar slot used for when you are dragging and dropping something. This method works somewhat, but you have an ugly item icon stuck to your crosshair, and if you click anywhere on the screen that isn't UI with the mouse cursor active, you'll toss the "held" item away, since you're effectively just holding it on your drag-and-drop. Less than ideal, but very close, and a very creative way to get around this issue with the game.