U - Lint ingredient order

[ddbeck]

A follow up to #320 .

We should lint for the order of ingredients in pages.

Implementation notes

This is a little bit tricky. Some ingredients are only meaningful in order (e.g., prose.short_description) and linting the ingredient in-depth is the only meaningful check on it. But others can exist anywhere in a page (most prose sections).

A possible route to implementation might be to use html-require-recipe-ingredients. After linting ingredients, it could check to see if any new messages were logged to a file. If not (i.e., if all ingredients matched), then it could check the order of section headings. This might be good enough for many, maybe even most, pages.

Acceptance criteria

The linter is able to check that all ingredients appear in the correct order, according to the specification agreed in mdn/sprints#3075.

[ddbeck]

This in progress as #420, but I don't expect it will be merged by the end of sprint Echo Foxtrot (i.e., today).