feat: Add item rarities into all storage overlay pages

src/main/kotlin/util/mc/FakeSlot.kt

@@ -0,0 +1,15 @@
+package moe.nea.firmament.util.mc
+
+import util.mc.FakeInventory
+import net.minecraft.item.ItemStack
+import net.minecraft.screen.slot.Slot
+
+class FakeSlot(
+	stack: ItemStack,
+	x: Int,
+	y: Int
+) : Slot(FakeInventory(stack), 0, x, y) {
+	init {
+		id = 0
+	}
+}