Add extra themes #552

Job	Run time
Rustfmt	14s
Tests (ubuntu-latest)	1m 54s
Build Book	1m 33s
Clippy	2m 26s
Tests (macos-latest)	1m 34s
Build Wasm Examples (callback-example)	58s
semver	45s
Tests (windows-latest)	3m 47s
Code Coverage	9s
Build Examples (basic_charts)	25s
Build Examples (kaleido)	1m 32s
Build Wasm Examples (basic)	49s
Build Examples (custom_controls)	24s
Build Examples (scientific_charts)	33s
Build Examples (subplots)	33s
Build Examples (financial_charts)	31s
Build Examples (3d_charts)	27s
Build Examples (shapes)	25s
Build Examples (maps)	36s
Build Examples (images)	40s
Build Examples (ndarray)	27s
	20m 42s

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