Better gold tools

We can add a mechanic that can make gold tools better, with a smithing table, we can use iron ingot to increase the tool's durability, but we can also use copper ingot but it'll increase less durability. But there's a great buff for the golden pickaxe, if you use iron/copper ingot on it, it not only increase the durability, but also increase its "hardness" which can make the pickaxe to mine more blocks than usual