Add trossen widow ai arm implementation to supported robots

[brysonjones]

What this does

Adds support for Trossen Widow AI robotic arms to LeRobot.

Includes follower robot implementation for recording and inference, plus leader arm for teleoperation with haptic feedback.

Addresses: #1357

How it was tested

• Tested with physical Trossen Widow AI hardware
• Verified tele-operation with effort feedback between leader/follower arms
• Confirmed integration with existing lerobot scripts (record, teleoperate, etc)

Testing Instructions

Install dependencies

pip install -e ".[trossen_arm]"

Test teleoperation

lerobot-teleoperate \
  --robot.type=widow_ai_follower \
  --robot.port <FOLLOWER_IP> \
  --teleop.type=widow_ai_leader \
  --teleop.port <LEADER_IP>

[pkooij]

Hi thank you for this PR, very nice addition8 I am very busy this week but I will take a look asap next week!