Write decision about Frontend Documentation system

[markus2330]

As suggested by @Bushuo and @badnames (meeting notes and #104 (comment))

• I did not yet look deeper into it, but maybe React Docgen could be combined with mdBooks.
• React Docgen outputs a json file that we could then parse into a markdown file.
• https://docusaurus.io/
• API-Extractor
• TypeDoc
• JSDoc
  • https://jsdoc.app/about-getting-started.html
  • https://www.typescriptlang.org/docs/handbook/jsdoc-supported-types.html#param-and-returns
  • https://www.inkoop.io/blog/a-guide-to-js-docs-for-react-js/
  • https://github.com/jsdoc/jsdoc
• Storybook
• React Styleguidist

[markus2330]

I added the two options from @badnames comment in the meeting notes above.

[markus2330]

I also added the suggestion in #104 (comment) from @absurd-turtle above.