Please consider adding PlantUML as an option for preview.
Instead of just syntax highlighting the code in the output, when the "language type" is plantuml please render a diagram instead.
e.g. the following
```plantuml
@startuml
Bob -> Alice : hello
Alice -> Bob : Go Away
@enduml
could render
Please consider adding PlantUML as an option for preview.
Instead of just syntax highlighting the code in the output, when the "language type" is
plantumlplease render a diagram instead.e.g. the following
could render
