Nutri-Score panel: add possible reasons when Nutri-Score(s) computed different than Nutri-Score on package

[stephanegigandet]

What

• If the Nutri-Score printed on a product package (in the labels field on OFF) is different from the Nutri-Score computed (both the 2021 and the 2023 versions), we could add a sub knowledge panel to explain what can be the possible reasons, such as:
• out of date data
• incorrect categorization as food or beverage
• imprecise estimation of ingredients (fruits/vegetables/legumes, and milk for the 2021 version)
• etc.
  This could encourage users to fix data issues, and manufacturers to enter more precise data.

Part of

• #5517

[alexgarel]

This would be great as it helps people get involved in participating.