PlantUML.js support

[yarons]

Rendering with PlantUML.js can reduce processing time drastically and allows more flexibility:
https://plantuml.github.io/plantuml.js
https://github.com/plantuml/plantuml.js

[frederikheld]

Thanks for the suggestion!

I'm not actively developing this action right now as it serves its purpose as it is. But I'll keep this issue open and might look into it in the future.

[yarons]

I've developed something in the meanwhile.
https://github.com/Maagan-Michael/mkdocs-plantuml

Thank you :)