/**
 * Validates if an email address is valid.
 *
 * @param {string} email - The email address to be validated.
 * @returns {boolean} True if the email is valid, false otherwise.
 *
 * @example
 * ```typescript
 * isValidEmail("user@example.com"); // true
 * isValidEmail("invalid.email"); // false
 * isValidEmail("test@domain.co.uk"); // true
 * ```
 */
export declare const isValidEmail: (value: string) => boolean;