Broken documentation

[comkieffer]

It seems that the generated documentation for this package is broken:

For example: https://docs.ros2.org/galactic/api/ament_index_python/api/packages.html is empty even though the packages.py file itself has docstrings.

[audrow]

Thanks for pointing this out, @comkieffer. I think the Python API is currently a work in progress. It's one of our goals for the next ROS 2 version: ros2/ros2_documentation#1782.

FYI @clalancette.