Add facet for "Units of Alcohol"

[teolemon]

What

• Leverage the newly added alcohol units to add a facet for "Units of Alcohol"
  • eg: "Products with 5 units of alcohol"

[aleene]

Do not know what you talk about.

I added Alcohol units to the nutrition taxonomy a while ago (UK, FR, AUS, SA).

[teolemon]

@hangy recently added units of alcohol calculations to Product Opener. It's related to that, in order to see if we can leverage it to create new pages

[hangy]

• I added the calculation for Calculate Alcohol units in wines and beers #241 the in cc7e7e4.
• It is not used anywhere right now, because we are missing Taxonomize quantities #247.
• The UK unit of alcohol is calculated using the quantity in milliliters, so a better understanding of what a quantity like "6 bottles à 33 cl" could be needs to be implemented first.