33. Rotate Array - Circular Shift

// Example 1
let nums = [1,2,3,4,5,6,7];
rotate(nums, 3);
// nums becomes [5,6,7,1,2,3,4]
// Rotated right by 3: [1,2,3,4,5,6,7] → [5,6,7,1,2,3,4]

// Example 2
let nums = [-1,-100,3,99];
rotate(nums, 2);
// nums becomes [3,99,-1,-100]