add collecting coins

scripts/components/collectable.gd

@@ -0,0 +1,22 @@
+class_name CollectableComponent
+extends Node
+
+var root: Node
+
+@export var area2d: Area2D
+@export var collectable_data: Resource
+
+signal collected(amount: int)
+
+func _ready() -> void:
+    if area2d:
+        area2d.body_entered.connect(_on_area2d_body_entered)
+    else:
+        print("Collectable node missing Area2D child.")
+
+    root = get_parent()
+
+func _on_area2d_body_entered(body: Node2D) -> void:
+    if body.has_node("CanPickUpComponent"):
+        collected.emit(collectable_data.amount)
+        root.queue_free()