feat: Improve ingredient detection

[raphael0202]

• Detect allergen and organic farming mentions that are next to the ingredient list
• Store ingredient extraction results in image_detection table

[codecov]

Codecov Report

Merging #1289 (7090693) into main (4b7e130) will increase coverage by 0.33%.
The diff coverage is 38.32%.

❗ Current head 7090693 differs from pull request most recent head af32845. Consider uploading reports for the commit af32845 to get more accurate results

@@            Coverage Diff             @@
##             main    #1289      +/-   ##
==========================================
+ Coverage   56.74%   57.08%   +0.33%     
==========================================
  Files          78       79       +1     
  Lines        7586     7653      +67     
==========================================
+ Hits         4305     4369      +64     
- Misses       3281     3284       +3     

Files	Coverage Δ
robotoff/models.py	95.51% <ø> (ø)
robotoff/settings.py	92.15% <ø> (ø)
robotoff/prediction/ingredient_list/postprocess.py	98.41% <98.41%> (+84.39%)	⬆️
robotoff/prediction/ocr/grammar.py	21.53% <0.00%> (ø)
robotoff/prediction/ingredient_list/__init__.py	42.26% <50.00%> (+0.33%)	⬆️
...rediction/ingredient_list/transformers_pipeline.py	14.01% <14.01%> (ø)

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