added docs section and tweaks to chest spawning

scripts/tube_top.gd

@@ -13,6 +13,15 @@ func _on_player_detect_body_entered(body: Node3D) -> void:
 		if open and active:
 			anim_player.play("close")
 			open = false
+	
+	if body is Chest:
+		if !body.claimed:
+			body.claimed = true
+			var old_pos = body.global_position
+			body.get_parent().remove_child(body)
+			get_tree().current_scene.add_child(body)
+			body.global_position = old_pos
+	
 
 func _on_switch_1_switch_changed() -> void:
 	if open: