Migrate packaging to pyproject.toml - #217

Failed to execute ["/home/runner/micromamba-bin/micromamba",["shell","init","-s","zsh","-p","/home/runner/micromamba-root","-y","--log-level","warning"]]: Error: The process '/home/runner/micromamba-bin/micromamba' failed with exit code 109

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v2, actions/setup-python@v2, mamba-org/provision-with-micromamba@main. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Failed to restore: Cache service responded with 400