Add `plotly_static` `async` API #71

Job	Run time
Rustfmt	15s
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	12m 17s
Tests (macos-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	2m 52s
Build Book	3m 58s
Code Coverage	10s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 20s
Clippy	4m 3s
Tests (ubuntu-latest, firefox, plotly_ndarray,plotly_image,static_export_geckodriver,static_expor...	3m 3s
Build Wasm Examples (basic)	58s
Build Wasm Examples (callback-example)	1m 12s
semver	44s
Build Examples (3d_charts)	35s
Build Examples (custom_controls)	41s
Build Examples (subplots)	32s
Build Examples (customization/density_mapbox_example)	58s
Build Examples (statistical_charts)	36s
Build Examples (kaleido)	1m 18s
Build Examples (customization/consistent_static_format_export)	1m 22s
Build Examples (financial_charts)	37s
Build Examples (basic_charts)	36s
Build Examples (images)	47s
Build Examples (customization/multiple_plots_example)	37s
Build Examples (ndarray)	35s
Build Examples (maps)	46s
Build Examples (themes)	33s
Build Examples (scientific_charts)	35s
Build Examples (shapes)	30s
	44m 30s

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