Create pipeline-component for PlantUML
For various sorts of diagrams I use [PlantUML](https://plantuml.com/). With PlantUML images can be generated from text-based diagram definitions. As PlantUML is supported by tools/services wide and far, it is a bit of an industry standard. To make it possible to generate the images as part of a build-step, it would be nice if we could provide a PlantUML component. Thoughts/Suggestions?
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