Shuffle indexes

This Node can generate a sequence of integers of any length, which is output as an Array. However, the values of this sequence are not output in the correct order, e.g., 0, 1, 2, 3, 4, 5, as in the case of a Range Node, but in a random order, e.g., 3, 1, 5, 4, 0, 2. This allows the Node to be useful, for example, in reading out elements of another Array in random order while ensuring that all numbers between 0 and a given number are used.