Add UI support for writing properties to Folksonomy engine

[Pierre Slamich]

What

• Add UI support for writing properties to Folksonomy engine
• Leverage the existing support in openfoodfacts-dart

Code pointers

Mockups

Figma mockups

• Folksonomy Engine: https://www.figma.com/files/project/33303529
• Beware that:
  • they might not be final and might not have been signed off
  • there might be some additional related mockups not in this file. Please ask @teolemon for a confirmation

Part of

• #697

[Pierre Slamich]

@monsieurtanuki I'm bumping it to P1, in the context of Open Products Facts update

[Pierre Slamich]

@alexgarel deployed an update to auth, READ and WRITE works on the web (and should with the API as well)
https://world.new.openproductsfacts.org/product/6943279410511/wiko-jerry-noir-space-grey

[Pierre Slamich]

cc @monsieurtanuki