Write a function that takes an array of strings and returns a human-readable list formatted with commas and the word "and" before the last item. This is similar to how natural language lists are formatted in English.
For example:
["apple"] → "apple"["apple", "banana"] → "apple and banana"["apple", "banana", "cherry"] → "apple, banana and cherry"["", "two", ""] → ", two and "
Example Inputs & Outputs
formatList([])
// → ""
formatList(["apple"])
// → "apple"
formatList(["apple", "banana"])
// → "apple and banana"
formatList(["apple", "banana", "cherry"])
// → "apple, banana and cherry"
formatList(["one", "two", "three", "four"])
// → "one, two, three and four"
Constraints & Edge Cases
- The input will always be an array of strings
- Return an empty string if the array is empty
- Handle 1-item, 2-item, and 3+ item cases correctly
- Items may include empty strings, but treat them as valid values
