Feature request: mermaid and graphviz can work together

[blackerliu]

//mermaid

//graphviz

In markdown document, mermain and grapviz can cowork when previewed and converted to PDF and PPT

[mikesmullin]

Thanks for introducing me to Mermaid. Very cool project.

Mermaid lets you create diagrams and visualizations using text and code.
https://mermaid-js.github.io/mermaid/#/

see also: VSCode Extension: Mermaid Preview
https://marketplace.visualstudio.com/items?itemName=vstirbu.vscode-mermaid-preview