🚀 Add Automated Deployment Workflow to PyPI

Description

This pull request introduces a comprehensive GitHub Actions workflow (.github/workflows/deployment.yml) to automate the testing, building, and deployment of the scikit-sampling library.

The new workflow establishes a full Continuous Integration and Continuous Deployment (CI/CD) pipeline, ensuring that every change is validated and that releases to PyPI are seamless and reliable.

Workflow Breakdown

The workflow is composed of several sequential jobs that run on ubuntu-22.04 and leverage the high-performance uv tool for all package management tasks:

1. pre-commit:

   • Trigger: Runs on all pull requests and pushes to main.
   • Action: Executes pre-commit run --all-files to enforce code style, formatting, and other quality checks across the entire repository.

2. tests:

   • Trigger: Runs on all pull requests and pushes to main.
   • Action: Installs all dependencies and runs the full pytest suite, including coverage checks, to ensure the library's functionality is correct and to prevent regressions.

3. build:

   • Trigger: Runs only on pushes to the main branch, after pre-commit and tests have passed successfully.
   • Action: Builds the source distribution (sdist) and wheel (.whl) using uv build and archives them as artifacts.

4. deploy:

   • Trigger: Runs only after a successful build on the main branch.
   • Action: Downloads the packaged artifacts and publishes them to PyPI using uv publish. This step is protected and requires the UV_PUBLISH_TOKEN secret, ensuring that only authorized changes to main result in a new release.

Benefits

• Automation: Fully automates the release process, eliminating manual steps and reducing the risk of human error.
• Quality Assurance: Guarantees that all code merged into main passes both linting and all tests before a release is even considered.
• Immediate Feedback: Pull requests are automatically checked, providing quick feedback to contributors.

This workflow is a critical step in professionalizing the project's development and release cycle.