Release 0.2.1

[vbkaisetsu]

• Add description and readme fields to pyproject.toml
• Replace PyO3/maturin-action with uv for uploading packages. maturin upload will be deprecated.

[Copilot]

Pull request overview

This PR prepares the 0.2.1 release by updating package metadata and adjusting the GitHub Actions release workflow to publish distributions using uv instead of maturin upload.

Changes:

• Bump project version to 0.2.1 in both pyproject.toml and Cargo.toml.
• Add description and readme metadata to pyproject.toml.
• Update release workflow to install uv and publish artifacts via uv publish; improve README shell code fences.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
pyproject.toml	Bumps version and adds package metadata (description, readme) for PyPI.
Cargo.toml	Bumps Rust crate version to match the release.
README.md	Tweaks installation command code fences for clearer rendering.
.github/workflows/CI.yml	Switches the publish step from maturin-action upload to uv publish.

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[Copilot]

actions/download-artifact with merge-multiple: true extracts the built distributions (e.g., *.whl, *.tar.gz) into the workspace; it does not create files matching wheels-*. As written, uv publish wheels-* will expand to nothing (or publish the wrong paths) and the release job won’t upload the built artifacts. Publish the actual distribution files (e.g., set download-artifact path: dist and run uv publish dist/*, or publish target/wheels/* depending on where the artifacts land).