Add inventory system

scripts/Items/Potion.gd

@@ -0,0 +1,13 @@
+class_name Potion extends "res://scripts/Items/Item.gd"
+
+func getName() -> String:
+	return "Potion"
+
+func getCategory() -> ItemCategory:
+	return ItemCategory.MEDICINE;
+
+func isConsumable() -> bool:
+	return true;
+
+func consume() -> void:
+	print("Consuming Potion");