codimg: code blocks -> syntax highlighted SVG

Leaving my general dislike for Webflow aside for now, let’s at least agree on one specific thing: it is terrible at code. We have markdown.enso.no for the actual writing – you draft in markdown, it gives you something you can paste straight into Webflow’s WYSIWYG editor – and that pipeline is fine, right up until there’s a code block in it. Then it falls apart. Smart quotes where you typed straight ones, your indentation quietly flattened, the whole thing landing in the body font like it’s a line from a brochure. There are workarounds (an embed block, or an iframe if you really hate yourself), and not one of them is nice.