Add YOLO-World Model Support in tracker_node.py

[yukiharada1228]

PR Type

• Feature

Overview

• Added support for YOLO-World model in tracker_node.py.

Detail

• Introduced use_world variable to check if the YOLO model name contains "world".
• When using YOLO-World model, if self.classes is defined, it sets these classes in the model and then resets self.classes to None.
• Otherwise, retains existing self.model.fuse() invocation.

Test

• I have tested this change with rosbag