Is your feature request related to a problem? Please describe.
I want to change the wand item for the mod to a named item. Ex. A stick named "Litematica Stick"

Describe the solution you'd like
Support NBT for the wand, or whatever you call it.

Describe alternatives you've considered
Deal with sticks being a bit annoying.

Additional context
I don't want to change the item from a stick, just to a named stick (using an anvil) as sticks are really easy to get, given that I don't have one on me it won't take long to find one.

This has been implemented quite some time ago in the main development version in 1.12.2. Unfortunately that code just hasn't been ported to the 1.13.2+ versions yet since June 2019, so this functionality is not in any of the 1.13.2+ versions yet, but will come to them when the next update from 1.12.2 happens. Those changes also include not checking the item damage of damageable items, meaning that you can also use for example your pickaxe as the tool item, without the damage making it not recognizable as the tool.

Personally I prefer using something like Cooked Beef or a Diamond Pickaxe as the tool item, as I always have that on me, and thus I don't need to use up an extra slot for the tool item (even temporarily). I just toggle on and off the tool item functionality with the hotkey (by default M + T), basically only enabling it when I need to move/nudge something.