CLI: sort reports by word list & location

[RickyDaMa]

Ideally I'd like to sort by word list, and then by location

Questions/Thoughts:

• Should Report impl Ord? I don't think so
• Should Location impl Ord? It could, but how do you manage axis order?
  • Currently they're unsorted due to use of a HashSet
  • Sorting alphabetically is an easy option but probably not what people want (personally I'd want more common axes sorted first, like wght and wdth)
  • We could use insertion order, but we'd have to pull in a new dependency for stable maps
  • Or we could use axis order for the font, but this means you must have a reference to a font to be able to sort. I think this is my current preferred option
• Exemplars are already sorted, so no more details to sort on