Wikilinks between doc pages

[dundalek]

Wiki links to doc pages are not linkified, e.g. in ring example.

• wikilings are transformed already for vars, so maybe could add the pages hierarchy there during markdown processing

• alternatively remark plugin for docusaurus

  • https://github.com/landakram/remark-wiki-link
  • adding remark plugins to docusaurus
    • https://docusaurus.io/docs/markdown-features/plugins#installing-plugins