Get the Eco-Score into smoothie

[teolemon]

Implementation

• Clone the system that displays Nutri-Score on the scan card
• Change the server request url to ecoscore (server-side issue: Add an API field to display the Eco-Score openfoodfacts-server#4262)
• If (and only if) the server sends back a proper value (a, b, c, d or e), hide the classic CO2 value and display the new score
  https://world.openfoodfacts.org/api/v0/product/3414280980209.json?fields=ecoscore_grade (Here it shows null)
• Please use the Eco-Score visuals placeholders until we have the final visuals.

Placeholders with the right size

https://static.openfoodfacts.org/images/icons/ecoscore-a.svg
https://static.openfoodfacts.org/images/icons/ecoscore-b.svg
https://static.openfoodfacts.org/images/icons/ecoscore-c.svg
https://static.openfoodfacts.org/images/icons/ecoscore-d.svg
https://static.openfoodfacts.org/images/icons/ecoscore-e.svg
https://static.openfoodfacts.org/images/icons/ecoscore-unknown.svg

https://static.openfoodfacts.org/images/icons/ecoscore-a.png
https://static.openfoodfacts.org/images/icons/ecoscore-b.png
https://static.openfoodfacts.org/images/icons/ecoscore-c.png
https://static.openfoodfacts.org/images/icons/ecoscore-d.png
https://static.openfoodfacts.org/images/icons/ecoscore-e.png
https://static.openfoodfacts.org/images/icons/ecoscore-unknown.png

[stephanegigandet]

The Eco-score will be shown in Smoothie's scan cards as an attribute: #32 The attributes will replace the current display with the Nutriscore, NOVA and CO2,, and add the Eco-score.

We should also display the Eco-score details in an environment tab in the full product page.

[monsieurtanuki]

The Eco-score will be shown in Smoothie's scan cards as an attribute: #32

@stephanegigandet Then this issue doesn't make sense anymore, does it?

[stephanegigandet]

Issue replaced with #32 and #37