Allow to add/edit packaging shapes

[teolemon]

What

• Allow to add/edit packaging shapes

Tasklist

• Introduce a shape selector
  • 
• Add support for autocomplete on the shapes taxonomy
  • Add server-side support for shape images (there's a way to hardcode it, since the images are already deployed)
    • Serve packaging shapes icons openfoodfacts-server#5591 @stephanegigandet
    • https://world.openfoodfacts.org/api/v2/taxonomy?tagtype=packaging_shapes&include_root_entries=1&include_children=0&lc=fr&cc=fr
    • Ensure we support packaging_shapes and packaging_materials taxonomies openfoodfacts-dart#605

Why

• ADEME project

Part of

• Product addition (tracker) #1379