Align structurizr output aesthetics with default structurizr tools

[AWhetter]

The structurizr output currently looks like this:

The same diagram looks like the following when output with structurizr tools (https://structurizr.com/ lite, on-prem, or demo):

There's some commonality in the design -- like colours and basic shapes -- but, in my opinion, the kroki output looks less aesthetically pleasing than the structurizr output.

I am proposing that kroki match the styling of structurizr more closely by default, possibly by using structurizr-autolayout to do the output rather than using the PlantUML exporter.

[ggrossetie]

As far as I know, this is the best we can do since the structurizr.com rendered is not open source. See the comments below from Structurizr creator:

Correct, the structurizr.com renderer is not open source, but the Structurizr DSL and Structurizr CLI are open source. The DSL allows you to create a software architecture model, while the CLI provides an export to a number of open source tools, including PlantUML, Mermaid, and WebSequenceDiagrams. These exporters are open source too (and provided by the Structurizr Java extensions project).

-- Simon Brown #510 (comment)

Yes, that's correct, and the StructurizrPlantUMLWriter is probably the best output of PlantUML and Mermaid (the Graphviz libary is only used for automatic layout, it doesn't produce full diagrams).

-- Simon Brown #510 (comment)

[simonbrowndotje]

since the structurizr.com rendered is not open source

The Structurizr UI has been open source since Jan 2023 -> https://github.com/structurizr/ui

As mentioned in #1758 though, you will need to run the Structurizr renderer in a web browser, and use something like headless Chrome and Puppeteer to extract the diagrams.