/**
 * Pads or trims a string to match a specified length.
 * @param value - The input string to process
 * @param length - The target length
 * @param padChar - Character used for padding (default: '0')
 * @param alignRight - If true, right-aligns by padding left; otherwise left-aligns (default: true)
 * @returns The padded or trimmed string of exact length
 */
export declare const padOrTrim: (value: string, length: number, padChar?: string, alignRight?: boolean) => string;