How to link to plantuml diagram in doxygen?

@darion 

To link to a PlantUML diagram in Doxygen, you can follow these steps:

1. Create your PlantUML diagram and save it as a .puml or .plantuml file in your project directory.
2. Add the PlantUML diagram to a page in your Doxygen documentation using the following syntax:

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@startuml
!include path/to/your/diagram.puml
@enduml

1. Generate the Doxygen documentation for your project.
2. In your Doxygen documentation, you can link to the PlantUML diagram using the following syntax:

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![Diagram Title](path/to/your/diagram.png)

This will create a clickable link to the PlantUML diagram in your Doxygen documentation. Make sure to replace "Diagram Title" with the title of your diagram and "path/to/your/diagram.png" with the path to your generated PlantUML diagram image file.