T6572: Move developer docs to main website

This is the initial push to move the developer docs on to the main website and organise them.

added 21 commits

• da9532f8...bc222ae8 - 5 commits from branch master
• 1065be47 - Add documents from developer.apertis.org
• 53bb5d18 - Change front matter trailing marker for Hugo
• bef642d9 - Convert HotDoc formatting for Hugo
• 3e723335 - Move developer index.md to _index.md
• ec51631c - Move developer images to correct folder
• 887b3fa1 - Tweak path to multimedia.md due to naming clash
• fc1d6906 - Clean up developer index
• 5a2709e3 - Update internal links to use "ref" shortcode"
• 35e11987 - Patch up links to missing App store page
• bff37598 - Tweak old links to old sites
• 8b3c3be3 - Update links broken by move to ref shortcode
• c2da5870 - Remove unexpected markup from documents
• 21bbe3be - Add creation dates for developer documentation
• c108e7c0 - Inline debos recipe examples
• fca1456a - Clean up titles and formatting of developer docs
• 5a27dd63 - Point to local copy of developer docs

Compare with previous version

enabled an automatic merge when the pipeline for 5a27dd63 succeeds

aborted the automatic merge because target branch was updated

mentioned in merge request !103 (merged)

added 21 commits

• 5a27dd63...cff13ee0 - 5 commits from branch master
• 286d5488 - Add documents from developer.apertis.org
• 453977a1 - Change front matter trailing marker for Hugo
• 3bb17562 - Convert HotDoc formatting for Hugo
• e156cd2c - Move developer index.md to _index.md
• 02faa07f - Move developer images to correct folder
• 156f2465 - Tweak path to multimedia.md due to naming clash
• 056173c6 - Clean up developer index
• 749945ba - Update internal links to use "ref" shortcode"
• 597af7c0 - Patch up links to missing App store page
• 96826db7 - Tweak old links to old sites
• cd14862c - Update links broken by move to ref shortcode
• 14ac8ffe - Remove unexpected markup from documents
• 539a720c - Add creation dates for developer documentation
• 7b0645c0 - Inline debos recipe examples
• a7232521 - Clean up titles and formatting of developer docs
• 38161d81 - Point to local copy of developer docs

Compare with previous version

merged