Deprecate kaleido #644

Job	Run time
Rustfmt	14s
Clippy	3m 44s
semver	56s
Tests (ubuntu-latest)	2m 58s
Tests (windows-latest)	5m 0s
Code Coverage	10s
Tests (macos-latest)	3m 51s
Build Book	3m 9s
Build Examples (images)	39s
Build Examples (customization)	24s
Build Examples (ndarray)	33s
Build Examples (scientific_charts)	27s
Build Wasm Examples (basic)	57s
Build Examples (basic_charts)	28s
Build Examples (shapes)	26s
Build Examples (maps)	49s
Build Wasm Examples (callback-example)	53s
Build Examples (kaleido)	1m 18s
Build Examples (custom_controls)	37s
Build Examples (static_export)	1m 27s
Build Examples (3d_charts)	25s
Build Examples (subplots)	36s
Build Examples (themes)	36s
Build Examples (financial_charts)	33s
	31m 10s

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