update traffic light controller

[DhlinV]

What changes do you make in this PR?

• Please describe why you create this PR
• Vehicle can be controlled by traffic light, implemented by adding ghost vehicle when traffic light is red and replace the action by idm action
• update module test 'metadrive/tests/test_component/test_traffic_light.py' to test the functionality
  Screencast from 01-20-2025 03:37:12 PM.webm

Checklist

• I have merged the latest main branch into current branch.
• I have run bash scripts/format.sh before merging.
• Please use "squash and merge" mode.

[QuanyiLi]

Thank you for the PR.

I went through it already. I think It may not be the best implementation... Actually, the traffic light itself has a body, we can use it instead of the dummy vehicle. Just make it recognizable by the IDM policy, or specifically by the lidar. I am making a new PR to achieve this.