like to contribute mermaid example

[wgong]

Hi, I submitted a PR with mermaid example, please review,
#1722

Thanks

[falkoschindler]

Thanks @wgong! We'll have a look.
I'll close this feature request since we can discuss everything related to the PR over there.

[wgong]

@falkoschindler Thanks for your feedback, I have a new PR - #1724 after removing a prior commit