/**
 * Gets the parent directory path of a given directory path
 * Cross-platform compatible (Windows, macOS, Linux)
 * @param {string} dirPath - The path to get the parent directory from
 * @returns {string} The parent directory path
 *
 * @example
 * // On Unix-like systems (Mac/Linux)
 * getParentDirectory('/Users/documents/folder') // returns '/Users/documents'
 *
 * // On Windows
 * getParentDirectory('C:\\Users\\Documents\\folder') // returns 'C:\\Users\\Documents'
 *
 * // Works with both forward and backward slashes
 * getParentDirectory('C:/Users/Documents/folder') // returns 'C:/Users/Documents'
 */
export declare function getParentDirectory(dirPath: string): string;