Add pie plots

[FBumann]

Summary by CodeRabbit

Release Notes

• New Features
  • Added pie chart visualization capability for DataArrays and Datasets through the plotly accessor, supporting custom labels, color mapping, and faceted display options.

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Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

Introduces pie chart plotting functionality to xarray_plotly by adding a new pie() function in the plotting module, extending both DataArrayPlotlyAccessor and DatasetPlotlyAccessor with pie methods, and configuring slot ordering for the pie plot type in the configuration module.

Changes

Cohort / File(s)	Summary
Accessor API Extensions xarray_plotly/accessor.py	Added pie() methods to DataArrayPlotlyAccessor and DatasetPlotlyAccessor with parameters for names, color, facet_col, facet_row, and px_kwargs; updated __all__ exports to include "pie" in both classes
Plotting Core xarray_plotly/plotting.py	New pie() function processes DataArray slots, converts to DataFrame, determines value column, builds labels, and delegates to px.pie() with support for names, color, and faceting parameters
Configuration xarray_plotly/config.py	Added "pie" entry to DEFAULT_SLOT_ORDERS with slot ordering ("names", "facet_col", "facet_row")

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• Add dataset plotting accessor #2 — Introduces DatasetPlotlyAccessor class that receives pie method additions in this PR

Poem

🥧 A pie plot hops into view,
With names and colors, faceted too!
From DataArray to express so sweet,
The plotter's toolkit's now complete! 🐰✨

✨ Finishing touches

• 📝 Generate docstrings

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📜 Recent review details

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between c04a25b and d290e24.

📒 Files selected for processing (3)

• xarray_plotly/accessor.py
• xarray_plotly/config.py
• xarray_plotly/plotting.py

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