Provide coffee details

[sven1103]

More details to a coffee product can now be provided via an own property details.

[sven1103]

Example coffee entry with some details provided:

{
    "id": "dc43dd59-f615-4d68-9dd1-9180222d3733",
    "name": "black coffee",
    "price": 0.25,
    "cupping_score": 90,
    "info": {
      "origin": "South Africa",
      "description": "A really awesome coffee",
      "roast_house": "Manufaktur XY",
      "misc": {
        "flavor": "citrus"
      }
    }
  }