refactor: migrate repository to uv & simplify Pyodide build

[peter-gy]

How to test this PR?

git checkout this branch, then execute make. Everything should work without any further action (linting, tests, typechecks, doc-gen).

Running all the make targets still takes a while, because mypy and pytype are really slow and generating the Jupyter Book output also requires patience, given that we execute all notebooks on the fly to generate the HTML bundle.

Note

Please make sure you have uv installed and available on your PATH.
You can refer to the installation instructions here: https://docs.astral.sh/uv/getting-started/installation/

CHANGELOG

• Drop Poetry in favor of uv
• Move draco module source under src/
• Use Python 3.12.7
• Update .github/workflows/test.yml CI flow
• Make devcontainer Dockerfile slimmer (~2x image build performance improvement)
• Define [project.optional-dependencies] in pyproject.toml, allowing pip install draco to pull only core dependencies
  • pip install 'draco[server]': will include FastAPI deps
  • pip install 'draco[renderer]': will include deps to render chart specs
  • pip install 'draco[learn]': will include scikit-learn enabling draco.learn.train_model
• Stop maintaining custom Pyodide distribution, since clingo and vega-datasets are now members of the official Pyodide distribution (available through https://cdn.jsdelivr.net/pyodide//full/)
• Build JupyterLite into docs via jupyterlite-sphinx.

Pyodide Build Simplifications

The complexity of the current Pyodide build pipeline stems from the fact that clingo is an impure Python package (depends on cffi) without an official recipe for it in the Pyodide repo. In parallel to this PR I am opening PRs against https://github.com/pyodide/pyodide to include packages we need into their official build. This way, we can dramatically reduce the code we maintain in this repo responsible for WASM builds.

Foreign PRs

• Add vega-datasets package pyodide/pyodide#5183
• Add clingo package pyodide/pyodide#5184

Closes

Closes #895
Closes #884

[peter-gy]

For now we must use the dev version (rolling release pointing to pyodide@main) because it is the only distro over a public CDN which already includes pyodide/pyodide#5183 and pyodide/pyodide#5184.

As soon as we get a Pyodide release with clingo and vega-datasets included, we'll pin that version.

[domoritz]

Sounds good

[domoritz]

Thanks