Add Cooler, Bag, and compact hotbar systems

items/item_catalog.gd

@@ -0,0 +1,30 @@
+class_name ItemCatalog
+extends Resource
+
+const ItemDataType = preload("res://items/item_data.gd")
+
+@export var items: Array[ItemDataType] = []
+
+
+func get_item_by_id(item_id: StringName) -> ItemDataType:
+	if item_id.is_empty():
+		return null
+	for item: ItemDataType in items:
+		if item != null and item.item_id == item_id:
+			return item
+	return null
+
+
+func get_valid_items() -> Array[ItemDataType]:
+	var result: Array[ItemDataType] = []
+	var seen: Dictionary[StringName, bool] = {}
+	for item: ItemDataType in items:
+		if (
+			item == null
+			or not item.is_valid()
+			or seen.has(item.item_id)
+		):
+			continue
+		seen[item.item_id] = true
+		result.append(item)
+	return result