Add anchor links to FAQ questions
Closes #299 (closed)
Not completely happy about the links in the margin as it's a bit narrow but I found alternatives were no better:
- anchor on the right: is less clear what the link is here for, is it the answer already?
- anchor in-line on the left: looks okay-ish but messing the alignment is not so good.
Also the code is not DRY, I'm wondering if we shouldn't treat single questions as data in .yml, with categories to keep the page exactly as it is. Let me know if you think that's helpful for the future or too much, I'll do it in a separate MR.