Chore: add new model classes.

[mbasadi]

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[mbasadi]

How to send an SMS
import com.notificationapi.NotificationApi;
import com.notificationapi.model.NotificationRequest;
import com.notificationapi.model.User;
import com.notificationapi.model.SmsOptions;

public class SendSmsExample {
public static void main(String[] args) {
String clientId = "your_client_id";
String clientSecret = "your_client_secret";

    try (NotificationApi api = new NotificationApi(clientId, clientSecret)) {
        // Create the user with a phone number
        User user = new User("user123")
            .setNumber("+1234567890"); // Replace with the recipient's phone number

        // Create the SMS options
        SmsOptions smsOptions = new SmsOptions()
            .setMessage("Hello from NotificationAPI!");

        // Create the notification request with your template ID
        NotificationRequest request = new NotificationRequest("your_sms_template_id", user)
            .setSms(smsOptions);

        // Send the SMS
        String response = api.send(request);
        System.out.println("Response: " + response);

    } catch (Exception e) {
        e.printStackTrace();
    }
}

}