/**
 * .what = wraps an async operation with a CLI spinner showing elapsed time
 * .why = provides visual feedback during long-running operations
 * .note = spinner renders on its own line below the action, cleared on completion
 */
export declare const withSpinner: <T>(input: {
    message: string;
    operation: () => Promise<T>;
}) => Promise<{
    result: T;
    durationMs: number;
}>;