Introduce Spanish R.G.S.E.A.A packager code support

[teolemon]

Spanish packager codes have a specific format: R.G.S.E.A.A Registro General Sanitario de Empresas Alimentarias (RGSEAA)
https://static.openfoodfacts.org/images/products/377/000/106/0057/2.jpg
https://static.openfoodfacts.org/images/products/377/000/106/0057/2.json

RGSEAA 21.25030/L R.G.S.E.A.A. 21.25030/L
RGSEAA 31.002883T https://static.openfoodfacts.org/images/products/843/519/960/0595/1.jpg
RGSEAA:21.00106VA0a\nC https://static.openfoodfacts.org/images/products/843/187/627/5599/2.jpg

[teolemon]

dd.ddddd/(1 à 2 chiffres ou lettres)