feat(release): Restructure modules for packaging

[hubertdeng123]

The main issue this fixes is this error seen after installing through pip from pypi

Traceback (most recent call last):
  File "/opt/homebrew/bin/devservices", line 5, in <module>
    from main import main
ModuleNotFoundError: No module named 'main'

It didn't make sense to me to have a module named src for packaging purposes. The alternatives for getting this to work is to have a devservices directory inside src, or rename src to devservices. This implements those changes, and also fixes some typing errors that were somehow missed

I've tested this through a

python -m build
pip install dist/devservices-0.0.1.tar.gz