Added psycopg support. (#70)

fastapi_template/cli.py

fastapi_template/input_model.py

...late/{{cookiecutter.project_name}}/conditional_files.json

...ate/template/{{cookiecutter.project_name}}/pyproject.toml

...late/{{cookiecutter.project_name}}/replaceable_files.json

....project_name}}/{{cookiecutter.project_name}}/conftest.py

...{{cookiecutter.project_name}}/db_psycopg/dao/dummy_dao.py

.../{{cookiecutter.project_name}}/db_psycopg/dependencies.py

...kiecutter.project_name}}/db_psycopg/models/dummy_model.py

..._name}}/{{cookiecutter.project_name}}/tests/test_dummy.py

...ject_name}}/{{cookiecutter.project_name}}/web/lifetime.py

fastapi_template/tests/test_generator.py