fix: setup.py should generate importable packages named <project>_client (closes #520)

[tedo-benchling]

In order to allow multiple clients generated to be installed via setup.py, update the generated setup.py file so that the package installed is available to clients as
from <my_api>_client import Client
rather than just
import Client

This is accomplished by specifying packages=["{{package_name}}"] in the setup.py.jinja2 file and removing the package_dir={"": "{{ package_name }}"}, directive.

[dbanty]

Thanks for the fix! @Leem0sh does this fix #492?

[codecov]

Codecov Report

Merging #521 (8459c8a) into main (2c157aa) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #521   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           48        48           
  Lines         1639      1639           
=========================================
  Hits          1639      1639           

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[dbanty]

Some cursory testing tells me that this does fix #492. Though, admittedly, I don't really understand setup.py because I never use it 😅. So I'm mostly just assuming that @tedo-benchling is doing the right thing and that having the package name be in the generated lib is the correct behavior. Thanks for this fix!