docs(autoparking): document current 3D LiDAR API

[timothyanderson096-ocdealcheck]

Summary

• Document the Python HAL.getLidarData() API.
• Replace six obsolete /prius_autoparking/... topics with the current /autonomous_car/... interfaces.
• Document the 3D LiDAR fields returned to users.

Verification

The baseline documentation failed seven contract checks: six current ROS 2 topics and the Python LiDAR method were missing.

The corrected page passes all seven checks:

PASS
  all six current ROS 2 topics are documented
  Python HAL.getLidarData() is documented

git diff --check also passes.

Addresses #3468.

This PR is intentionally documentation-only and does not claim completion of the full visual parking manoeuvre.

[javizqh]

I will merge it just before a new version is released as the old documentation is still in use