IngredientList

We'll need this model, in order to store ingredientIds, that related to particular Grocery List.
With help of this model we'll be able to generate a few Grocery List with different ingredients inside it.

- [ ] Think about how we'll handle delete ingredient from GL
- [ ] Think about how we'll handle delete departments from GL(maybe when we'll delete department with few ingredients - we need to remove this ingredients from Ingredient list). So when we'll delete department - we need to get array with ingredients and remove them from IngredientList Model
- [ ] IngredientList will have relation with Grocery(analogy to Menu Model)