Add Cooler, Bag, and compact hotbar systems

items/item_data.gd

@@ -0,0 +1,36 @@
+class_name ItemData
+extends Resource
+
+enum Category {
+	ROD,
+	TOOL,
+	BAIT,
+	CONSUMABLE,
+	UTILITY,
+	QUEST,
+	COSMETIC,
+}
+
+@export var item_id: StringName
+@export var display_name: String
+@export_multiline var description: String
+@export var category: Category = Category.UTILITY
+@export var icon: Texture2D
+@export var stackable: bool = false
+@export_range(1, 999, 1) var max_stack: int = 1
+@export var usable: bool = false
+@export var equippable: bool = false
+@export var hotbar_allowed: bool = false
+
+
+func is_valid() -> bool:
+	return (
+		not item_id.is_empty()
+		and not display_name.strip_edges().is_empty()
+		and max_stack >= 1
+		and (stackable or max_stack == 1)
+	)
+
+
+func get_category_name() -> String:
+	return Category.keys()[category].capitalize()