Nutrients' table: switch/display of US form when `Countries where sold` contains `United-States`

[CharlesNepote]

Nutrients' table is determined by regulations in the United States. Currently when fixing a product sold in the US:

• either we do it from https://world.openfoodfacts.org and we have to manually create at least Trans fat, Cholesterol, Added sugars, Vitamin D, Calcium, Iron, Potassium, which takes time (~45 seconds per product).
• either we do it from https://us.openfoodfacts.org but the form is buggy, and it has impact on data quality

It would be great to have both:

• something that creates automatically the fields from US regulation when Countries where sold contains United-States, wherever we are
• the form issues fixed for https://us.openfoodfacts.org

As of today (2024-03-06), 22,000 products are concerned (products having a data quality error + sold in the US + having an image for nutrition). Manually creating the missing fields for all these products would take at least 275 hours/~40 days (at 7 hours/day).

[stephanegigandet]

Another option could be to have a specific nutrient table on world that would be a superset of EU + US (and possibly others) nutrition tables.