added setup.py and .gitignore for compatibility with traditional packaging tools

[muhammad-fiaz]

Hello, I added a setup.py file alongside a .gitignore for the Unsloth project. Since unsloth uses Poetry for publishing directly to PyPI, I added the setup.py file for compatibility with traditional Python packaging tools and legacy packaging support. The .gitignore is standard for Python projects, ensuring we don't track unnecessary files and keeping things clean.

Note that having both setup.py and pyproject.toml in the same project ensures compatibility with both legacy and modern Python packaging tools. Poetry will still be the main tool for managing dependencies and publishing, but adding setup.py allows the project to work with tools that rely on it. I’ve also made sure the settings in setup.py align with the configurations in pyproject.toml.

Let me know if you need anything adjusted! :)

[danielhanchen]

Hi - thanks for the PR - I'll review and get back to you - thanks a lot!