/**
 * Converts a number to a decimal string without using exponential notation.
 *
 * - Numbers without exponent are returned as-is.
 * - Numbers with a positive exponent (`e+N`) are expanded using locale formatting.
 * - Numbers with a negative exponent (`e-N`) are expanded manually to avoid
 *   precision limits of `Number#toFixed` and locale rounding.
 *
 * The sign of the number and the sign of the exponent are handled independently.
 * This guarantees correct formatting for cases like `-1.23e-8`.
 *
 * @param value Number or bigint to convert.
 * @returns Full decimal string representation without exponent notation.
 *
 * @example
 * stringifyNumberWithoutExp(1e25)
 * // "10000000000000000000000000"
 *
 * @example
 * stringifyNumberWithoutExp(1.23e-8)
 * // "0.0000000123"
 *
 * @example
 * stringifyNumberWithoutExp(-1.23e-8)
 * // "-0.0000000123"
 */
export declare function stringifyNumberWithoutExp(value: bigint | number): string;