Add Markdown Kroki suport

[leandro-costa]

Kroki provides a unified API with support for BlockDiag (BlockDiag, SeqDiag, ActDiag, NwDiag, PacketDiag, RackDiag), BPMN, Bytefield, C4 (with PlantUML), D2, DBML, Ditaa, Erd, Excalidraw, GraphViz, Mermaid, Nomnoml, Pikchr, PlantUML, Structurizr, SvgBob, Symbolator, UMLet, Vega, Vega-Lite, WaveDrom, WireViz.

https://kroki.io/examples.html#uml-diag

[cderv]

Thanks for suggestion. As others feature requests, we will consider it for future development, according to our priorities for each future versions.

In the meantime, I believe an extension could be made for this. (Mkdoc has an plugin for it for example. Sphinx too)

For references,

• node.js tool for this: https://github.com/yuzutech/kroki
• Julia package: https://github.com/bauglir/Kroki.jl
• Jupyter Magic: https://pypi.org/project/jupyter-kroki-magic/