Feature: Coded product page

Completed EAN product retrieval process.

Product page coded with following features:

EAN number submitted via the text input on index.html is added to the URL as a parameter.
URL Parameter is read to append the corresponding catalogue product from products.json to the page, with image, title, allergens and potentially more data if required.
A list is compiled of div containers for each corresponding allergen associated with the product.
The list is then cross referenced with the keys in local storage index. Duplicates are then highlighted with red to emphazise allergy

Things to note:

Product ID's have been temporarily altered for testing purposes - until proper EAN codes are associated. entries 2-10 now follow the naming convention 0000000000001 ++. This was done to buypass the code validation on the index input field, as the ID's did not contain 13-digit EAN ID's, but were only called "2", "3" etc
Styling... well... at least the page is working.🥹
Some sort of exaggerated notice can be implemented for cases where a marked allergy is detected. (Popup, a warning, red background, sound, etc.)
The page is directly based off the previous and hard-coded allergy.html-page, which for now is abandoned and should be removed.
Some mechanism to prevent opening a blank product (a 13-digit ID not contained within our JSON) could be in order. Can be a "No product found" redirect-link to go back to the input or potentially a filter preventing sumbitting on the index page.
Page is not linked to the kassalapp-API at this point.

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JNettli / 010-BarcodeAllergenScanner