Deprecate kaleido #673

Job	Run time
Clippy	3m 45s
Rustfmt	14s
semver	54s
Build Wasm Examples (basic)	57s
Code Coverage	20s
Build Wasm Examples (callback-example)	58s
Tests (ubuntu-latest)	3m 3s
Build Book	3m 11s
Tests (windows-latest)	5m 56s
Tests (macos-latest)	4m 37s
Build Examples (customization)	33s
Build Examples (custom_controls)	35s
Build Examples (3d_charts)	31s
Build Examples (kaleido)	1m 57s
Build Examples (financial_charts)	35s
Build Examples (basic_charts)	32s
Build Examples (scientific_charts)	32s
Build Examples (maps)	47s
Build Examples (images)	48s
Build Examples (themes)	35s
Build Examples (ndarray)	35s
Build Examples (static_export)	1m 29s
Build Examples (shapes)	36s
Build Examples (subplots)	34s
	34m 34s

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