`__init__.py` is created for dependencies, and can break them

[stevendee-recon]

E.g.: https://github.com/stevendee-recon/py-repro

That code runs fine (erroring on the invalid Company construction) if run via:

python3 -m venv venv
./venv/bin/pip3 install edgartools
./venv/bin/python app

But fails with an ImportError if run via either:

bazel run //app:app_bin

or

bazel run //app:app_bin.venv
source .app+app_bin.venv/bin/activate
python app

edgartools contains both edgar/entity/data.py and edgar/entity/data/. Apparently @rules_python populates a __init__.py under edgar/entity/data, which breaks anything that transitively imports anything out of edgar.entity.data.

My coding assistant tells me that setting enable_implicit_namespace_pkgs = True on the pip.parse in MODULE.bazel works around the issue. I’m not sure if that’s a straightforward fix or if it will break other things.