Interface for arx5 robot arm

[youliangtan]

Will be implemented by @2alee7

Robot: https://www.youtube.com/watch?v=wHBDZ7RnRa4

Docs:

• https://github.com/yihuai-gao/arx5-sdk
• Native py sdk: https://github.com/yihuai-gao/arx5-sdk/blob/main/python/arx5_interface.pyi

TODOs:

Create a new interfaces/arx5.py

from manipulator_gym.interfaces.base_interface import ManipulatorInterface
# from 

class ARX5Interface(ManipulatorInterface):
    def __init__(self):
        # super().__init__()
        self.Arx5CartesianController = Arx5CartesianController()
        
    @property
    def eef_pose(self):
        return self.Arx5CartesianController.get_eef_pose()
    
    @property
    ....

TODO: fill up all the abstract functions.