Create CODE_List of beers with filter

Hi Dominik,
I reworked our code from last Sunday. Now it appends rows as sublists to the list of lists (our previous version would make it impossible to later loop through all the lines and filter, since it would replace the previously appended row with a newly appended one).
Also added:
getting user input, printing it to confirm it was read OK and filtering results based on user input (3 cases: 1) all the criteria are empty - loops back to getting user input, 2) all the criteria are met or some of them are empty - returns all sublists meeting the criteria, 3) or no sublists meet the criteria mix.