Extend and re-use the Dataflows code outside of this project

[anjackson]

If there is interest, build on the Dataflows work (#26):

• Consider making it a reusable library, possibly integrating an editor into the 'practices' subsite.
• Set up as an npm module, e.g. d3-dataflow-tube-map, to make reuse easier.
• Support 'via' somehow?
• Consider using the 45° lines for things that take a while, as an alternative corner layout.
• Extend platforms for ```{dataflow}``` custom fenced code blocks???
  • Configuration | Observable Framework
    • markdown-it/markdown-it: Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed i.e. by hacking the code block highlighting hook.
  • MystMD
    - Plugin mechanism https://mystmd.org/guide/javascript-plugins
  • integrate into DecapCMS (as part of the 'practices' idea) in an editor set up for documenting dataflows and workflows.
    - DecapCMS https://decapcms.org/docs/custom-widgets/
  • integrate the markup into my own website, similar to the wikidata one
  • integrate the markup into mermaid.js as a dataflow option?!