/**
 * Watches for changes to the DOM tree using `MutationObserver`.
 *
 * @remarks
 * This hook creates a `MutationObserver` and observes the target node.
 * It automatically updates the observer when the configuration changes.
 *
 * @param target - The DOM node to observe.
 * @param callback - The callback to execute when mutations occur.
 * @param config - The mutation observer configuration options.
 *
 * @example
 * ```tsx
 * useMutationObserver(
 *   ref.current,
 *   (mutations) => {
 *     console.log("DOM changed!", mutations);
 *   },
 *   { childList: true, subtree: true }
 * );
 * ```
 */
export declare function useMutationObserver(target: Node | null, callback: MutationCallback, config?: MutationObserverInit): void;