fix cookiecutter keys, add keys and update templated code

cookiecutter.json

{{ cookiecutter.package_name }}/.gitlab-ci.yml

{{ cookiecutter.package_name }}/pyproject.toml

{{ cookiecutter.package_name }}/src/dal_poc/dml.py

...e_name }}/src/{{ cookiecutter.package_slug }}/__init__.py

...age_name }}/src/{{ cookiecutter.package_slug }}/common.py

..._name }}/src/{{ cookiecutter.package_slug }}/factories.py

...age_name }}/src/{{ cookiecutter.package_slug }}/models.py

...kage_name }}/src/{{ cookiecutter.package_slug }}/py.typed

{{ cookiecutter.package_name }}/tests/test_main.py