/**
 * Creates an immutable clone of an object.
 *
 * @param obj - The object to clone.
 * @returns The clone of the object.
 *
 * @example
 * const original = { a: 1, b: { c: 2 } };
 *
 * const cloned = clone(original);
 *
 * cloned.a = 3;
 * cloned.b.c = 4;
 *
 * console.log(original); // { a: 1, b: { c: 2 } }
 * console.log(cloned);   // { a: 3, b: { c: 4 } }
 */
export declare function clone<T>(obj: T): T;