feat: 添加Hitbox和Hurtbox，添加敌人和玩家之间的碰撞

scenes/components/hitbox_component.gd

@@ -0,0 +1,45 @@
+extends Area2D
+class_name HitboxComponent
+
+signal on_hit_hurtbox(hurtbox: HurtboxComponent)
+
+var damage := 1.0
+var critical := false
+var knockback_power := 0.0
+var source: Node2D
+
+
+func enable() -> void:
+	set_deferred("monitoring", true)
+	set_deferred("monitorable", true)
+	
+	
+
+func disable() -> void:
+	set_deferred("monitoring", false)
+	set_deferred("monitorable", false)
+	
+
+func setup(damage: float, critical: bool, knockback: float, source: Node2D) -> void:
+	self.damage = damage
+	self.critical = critical
+	knockback_power = knockback
+	self.source = source
+	
+	
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	
+	pass
+
+
+func _on_area_entered(area: Area2D) -> void:
+	if area is HurtboxComponent:
+		on_hit_hurtbox.emit(area)
+		print(area.owner.name)
+