Add a property to aid with alternative recommendations

[teolemon]

Problem

• On https://world.openfoodfacts.org/product/8719128117829/7up-free-mojito, we recommand products from the Mojito syrups category, which is not really helpful in terms of health. Conversely, we might have similar issues on the environment (eg in a beef steak category)
• To make actually relevant/good alternative recommandations to a food item in Open Food Facts, we need a category_equivalent_to property. For instance as an alternative to the "mojito syrups" category, suggest the "lemon flavored waters" category.
• Another option would be to use ML to do that, or to use ML to create the alternative category recommandations

@raphael0202 @stephanegigandet

[stephanegigandet]

There are many ways we could do this, the best thing would probably be to test it on a few categories where we feel it may be very useful. We could have a healthier category alternative, and a more environmentaly friendly alternative category.

So if take flavored syrups, an healthier alternative might be flavoured waters (hopefully less sugar), but from an environmental perspective, the syrup + tap water is best, so we could do the reverse suggestion on flavoured waters :)

Let's start with 1 or 2 broad categories where we can make useful suggestions. e.g. ham, beef patties etc.

[github-actions[bot]]

This issue has been open 90 days with no activity. Can you give it a little love by linking it to a parent issue, adding relevant labels and projets, creating a mockup if applicable, adding code pointers from https://github.com/openfoodfacts/openfoodfacts-server/blob/main/.github/labeler.yml, giving it a priority, editing the original issue to have a more comprehensive description… Thank you very much for your contribution to 🍊 Open Food Facts