Fix issue #1: Create a hello world python application using poetry

[snipr-ada]

This pull request fixes #1.

The issue has been successfully resolved. The changes include:

1. Creation of a new Poetry project with a pyproject.toml file, which defines the project metadata and dependencies.
2. Implementation of a "Hello World" function in hello_world/__init__.py, which prints "Hello, World!" when called.
3. Addition of a test in tests/test_hello.py to verify the functionality of the "Hello World" function by capturing and asserting the output.
4. Generation of a poetry.lock file to lock the dependencies, ensuring consistent builds.
5. Creation of an empty README.md and tests/__init__.py files to complete the project structure.

These changes collectively address the issue by setting up a Python application using Poetry, implementing the required functionality, and verifying it through tests. The test has been designed to ensure the "Hello World" function works as expected, and the project structure is consistent with Poetry's conventions.

Automatic fix generated by OpenHands 🙌