remove init for namespace packaging

[rbavery]

the presence of init.py files breaks installing wherobots-inference in the wherobots namespace if wherobots-inference doesn't have an init.py in the wherobots namespace. All subpackages in the namespace shouldn't have init.pys in order to be installed as standalone packages or be installed in the namespace.

@paleolimbot and I made this same change to wherobots-inference and wherobots-tools and are testing in wbc-images.

https://github.com/wherobots/wbc-images/pull/566

notion task:
https://www.notion.so/wherobots/namespace-packaging-is-broken-for-wherobots-inference-18bba32ec0278084a6a8fa99b9b8316a

tested this and the package can still be installed and imported after poetry install

# rave at rave-desktop in ~/work/wherobots-python-dbapi on git:ryan/remove-init-namespace-packaging ● [12:25:39]
→ poetry run python                         
Python 3.11.9 | packaged by conda-forge | (main, Apr 19 2024, 18:36:13) [GCC 12.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from wherobots.db import connect

>>> from wherobots.db.region import Region
>>> from wherobots.db.runtime import Runtime

[rbavery]

closing in favor of #28