Simplify python environment setup

[scottyhq]

Closes #263, #247, #308, #309

• remove setup.cfg (move to pyproject.toml)
• remove conda subfolder (docs all in CONTRIBUTING.md)
• add recommendation of using pixi for environment management (But keeps .binder/environment.yml in case people want to keep using conda/mamba)
• use pixi instead of conda-lock for multi-platform environment locks
• use pixi instead of setupminiconda in CI
• point to specific Pangeo Docker images for past workshops (scipy) in codespaces config

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[github-actions]

🎊 PR Preview ec7b056 has been successfully built and deployed to https://xarray-contrib-xarray-tutorial-preview-pr-310.surge.sh

🕐 Build time: 0.009s

_{🤖 By surge-preview}

[scottyhq]

https://tutorial.xarray.dev/intermediate/remote_data/cmip6-cloud.html#reading-from-the-remote-zarr-storage

intermediate/remote_data/cmip6-cloud.err.log

ds = xr.open_zarr(store=store, consolidated=True)

File ~/GitHub/xarray/xarray-tutorial/.pixi/envs/default/lib/python3.12/site-packages/zarr/storage/_common.py:316, in make_store_path(store_like, path, mode, storage_options)
    314     else:
    315         msg = f"Unsupported type for store_like: '{type(store_like).__name__}'"  # type: ignore[unreachable]
--> 316         raise TypeError(msg)
    318     result = await StorePath.open(store, path=path_normalized, mode=mode)
    320 if storage_options and not used_storage_options:

TypeError: Unsupported type for store_like: 'FSMap'

issue with zarr v2 -> zarr v3 I think.... pydata/xarray#9957

[scottyhq]

Still some broken links, but I'm going to go ahead and merge this in as it greatly simplifies getting things running locally across different platforms.