Redesign and improvement of publication page

[sammeltassen]

A markdown with no headings fails on built (because the static site generator can not generate a TOC). Although a title has been defined in the front matter. This is why titles now sometimes appear three times on a single page, e.g. https://heritage.tudelft.nl/en/publications/delta-dies.

Proposed improvement:

• Redesign of publication page
  • Progress bar
  • Absolute positioning of title and TOC
• Accepting markdowns without headings