Adoption of Poetry for Packaging and Dependency Management

[threeal]

This pull request incorporates Poetry into the project for improved packaging and dependency management. The changes made include:

• Adapted the pyproject.toml file to adhere to Poetry's format.
• Introduced a starter script entrypoint as an alternative to invoking the starter module.
• Integrated Poetry into the build.yaml workflow.
• Removed the Makefile.

This resolves #7.