/**
 * Converts a camelCase or PascalCase string to kebab-case format.
 *
 * Features:
 * - Handles camelCase to kebab-case conversion
 * - Handles PascalCase to kebab-case conversion
 * - Preserves consecutive numbers without separators
 * - Adds hyphens before uppercase letters and numbers
 * - Maintains lowercase letters as-is
 * - Handles edge cases like single characters and empty strings
 * - Preserves existing hyphens in the input string
 *
 * @param str - The string to convert to kebab-case
 * @returns The kebab-case version of the input string
 */
export declare function kebabize(str: string): string;