1. Array Function Rename

The method add(T[] array, int index, T element) has been renamed to addElement(T[] array, int index, T... elements).

Previously, unpredictable behavior occurred due to matching ambiguity. For example, add(array, 1, 2) could produce [10, 20, 1, 2] or [10, 2, 20] with array = [10, 20], whereas add(array, "1", "2") consistently produced ["10", "20", "1", "2"].

Update any rules using add(T[] array, int index, T element) to use addElement(T[] array, int index, T... elements).