[Feature]: Allow the ability to increase the stack size for the special items section

[NattoRiisa]

What is your idea?

The title is self explanatory.
This should be done under a config since it might create interesting things with it, make things more chaotic and such. 👁
I hate having to put only one per slot without being able to customize the size myself :<

Related to another problem or bug

No response

Additional context

No response