"Getting An Upgrade" Advancement Now Requires Copper Pickaxe

Currently, the "Getting an Upgrade" advancement is granted when a player crafts a stone pickaxe. However, getting stone already grants the "Stone Age" advancement, which overlaps conceptually. To make advancements more meaningful and separated, I suggest requiring a copper pickaxe (or better) for "Getting an Upgrade". This would also help give more purpose to copper tools, which are often underused.

Reasoning:

- Getting a stone already gives the "Stone Age" advancement.

- "Getting an Upgrade" should reflect a more notable improvement copper is a great middle step.

- Encourages players to engage more with copper in early game progression.

This small change would make the progression feel more natural and distinct.