Move designs.a.o to www.a.o

This series copies across the documents on designs.a.o.

Once this is merged, the majority of the content (apart from the private stuff) can be dropped from designs.a.o.

Documents have been skim checked to see that they appear to be properly rendered. Hugo shortcode refs have been used where possible to increase URL checking when website is generated.

added 13 commits

• e0b093b8 - 1 commit from branch master
• c21b22f9 - Add designs from designs.a.o
• 13f39020 - Add media from designs.apertis.org
• 04408e7f - Manual tweaks to add titles
• 6858b920 - Convert hotdoc metadata to Hugo frontmatter
• 1495ab3f - Convert hotdoc code blocks
• 35d4de00 - Unbreak page because of spurious code block deliminator
• af5a2a88 - Fix links in imported designs
• 8249ccd7 - Tweak HTML rendering to allow HTML elements in Markdown
• e26083c0 - Minor tidy up of designs
• ee26b8cf - Updating old links
• 9a6388ac - Remove link to designs.a.o
• c7250de9 - Fix up broken links

Compare with previous version

enabled an automatic merge when the pipeline for c7250de9 succeeds

merged