feat: script to compute ingredients distributions

[stephanegigandet]

a script to read products from the JSONL exports and compute some stats on ingredients.

sample output:

en:sea-salt {'count': 575, 'min': 0.0, 'max': 100.0, 'mean': 4.9432472547973285, 'stddev': 13.39285650370593}
en:yeast {'count': 586, 'min': 0.0, 'max': 100.0, 'mean': 2.6097431979562016, 'stddev': 6.053055675592899}
en:e110 {'count': 590, 'min': 0.0, 'max': 18.75, 'mean': 0.5072895627914018, 'stddev': 1.7187237839431908}
en:modified-starch {'count': 598, 'min': 0.0, 'max': 70.3, 'mean': 3.517524612411999, 'stddev': 6.083758668406214}
en:raising-agent {'count': 605, 'min': 0.0, 'max': 25.0, 'mean': 0.9015126759436042, 'stddev': 2.244794850335427}
en:lactic-ferments {'count': 609, 'min': 0.0, 'max': 23.75, 'mean': 6.586342299203504, 'stddev': 6.915535960981633}
en:cocoa-butter {'count': 621, 'min': 0.0, 'max': 26.25, 'mean': 8.769743375437656, 'stddev': 7.342648423979297}