Add Choropleth and ChoroplethMap trace types #226

Job	Run time
semver	1m 1s
Code Coverage	9s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 5s
Tests (ubuntu-latest, firefox, plotly_ndarray,plotly_image,static_export_geckodriver,static_expor...	3m 5s
Build Wasm Examples (callback-example)	1m 5s
Build Examples (financial_charts)	35s
Build Examples (custom_controls)	25s
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	2m 56s
Tests (macos-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 8s
Build Book	3m 4s
Build Examples (images)	56s
Clippy	3m 3s
Rustfmt	14s
Build Examples (shapes)	31s
Build Examples (subplots)	25s
Build Examples (customization/density_mapbox_example)	40s
Build Examples (basic_charts)	27s
Build Examples (kaleido)	1m 13s
Build Examples (scientific_charts)	32s
Build Wasm Examples (basic)	1m 1s
Build Examples (3d_charts)	39s
Build Examples (customization/consistent_static_format_export)	1m 36s
Build Examples (customization/multiple_plots_example)	34s
Build Examples (statistical_charts)	29s
Build Examples (ndarray)	35s
Build Examples (themes)	36s
Build Examples (maps)	45s
	32m 49s

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