[inbox] Data Literate - Improvements & Bugs

[rufuspollock]

• [ ] Remove CustomLink and correctly use next/link for internal links see e.g. https://github.com/vercel/next.js/discussions/11110
• [ ] use remark-smartypants or similar for ndash/emdash
• [ ] Show keywords on pages in a sensible way
• [ ] Switch on the type of pages so datasets are done differently from story pages (?)
• [ ] syntax highlighting in markdown (via highlightjs?)

Low

• [ ] 2021-07-01 design page with idea for processing graphs
• [ ] 2021-06-30 copy to clipboard functionality for data (in tables etc).
• [ ] 2021-06-30 copy to clipboard on code blocks in demo
• [ ] 2021-07-01 mermaid support (may be a bit complex so defer?)