add examples on building responsive plots and custom HTML pages #379

Job	Run time
Build Wasm Examples (wasm-yew-minimal)	1m 11s
Code Coverage	2m 3s
Clippy	2m 4s
Build Examples (3d_charts)	27s
Build Examples (basic_charts)	45s
Rustfmt	14s
semver	1m 52s
Build Examples (custom_controls)	30s
Tests (ubuntu-latest)	2m 5s
Build Examples (financial_charts)	23s
Tests (windows-latest)	1m 50s
Build Examples (images)	44s
Tests (macos-latest)	2m 7s
Build Examples (kaleido)	1m 34s
Build Examples (maps)	22s
Build Examples (ndarray)	26s
Build Examples (scientific_charts)	22s
Build Examples (shapes)	24s
Build Examples (subplots)	23s
	19m 46s

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