/**
 * Computes the moving average over a sliding window.
 *
 * @example
 * ```js
 * movingAverage([1, 2, 3, 4], 2) → [1.5, 2.5, 3.5]
 * ```
 *
 * @param {number[]} numbers
 * @param {number} windowSize
 *
 * @returns {number[]}
 */
export function movingAverage(numbers: number[], windowSize: number): number[];