General shopping list view (only for a group that has less than 3 members):
Should show the list of food that is missing for all recipes of the logged-in user (compare the list of food for all recipes with the general food list of that user).
Should count the total food items and total price of the missing food.
This PR includes:
General shopping list view (only for a group that has less than 3 members): Should show the list of food that is missing for all recipes of the logged-in user (compare the list of food for all recipes with the general food list of that user). Should count the total food items and total price of the missing food.