A page to create missing products

[raphodn]

Story

Users regularly add prices for products that not yet in the OxF database.
We usually have a few info regarding this product: name, picture, brand, weight (from the proof image, and the price tag predictions).

How

• a frontend page that lists products to add
  • image = draw a bounding box from the proof (we'll need a cropping mecanism)
  • product_name = extracted from the PriceTag prediction
  • other fields: simple form
• the product form, when filled, is sent to the Open Prices backend, who then sends an authenticated request to the OFF server (like robotoff does it. how exactly ??)

Related issues

• Create a list of products with data to complete (for a user) open-prices#610
• Allow users to edit a product (for basic fields) #459
• Create a tool to crop and transfer images to Open Food Facts #604
• We need to fix the sync first: OFF daily product (OPF) sync didn't happen open-prices#551

[TTalex]

related: #1165

[raphodn]

aaah i knew the issue was already out there 😅
closing the old one then..