FOSS gamedev and creative worlds

I want to be able to define the stack size for single items and item groups. I think, a stack size of 99 is to much for some items like food. If the player can put food for a week in one stack is to much. Also other items should be not stackable to 99.

I know that the engine doesn't have this feature, but it should. I also know that builders don't want this feature, but it should be availible for those who needs it.