Exclude items from autosuggestions

[monsieurtanuki]

Why - Problem description

cf. openfoodfacts/smooth-app#5096 by @g123k:

In many parts of the edition, we have an auto-completion feature.
However, this is a nonsense to list an item… which is already selected.

What - Proposed solution

The first thing to do would be to add a parameter to the autosuggestion methods: a list of items to exclude.
Then, if the developer asks for 10 items and we exclude 2 items, we should ask the server for 10+2 = 12 items and return the first 10 items that are not in the 2-item list.

Alternatives you've considered

Of course if the server could accept a list of items to exclude it would be better.