Enable Test Payload Sending for Trigger Configurations

At the moment, there is no way for users to send a test payload within the trigger configuration interface, making it difficult to validate setups before going live. Users must rely on real-world events or external tools to confirm that their triggers are functioning as expected, which can slow development and troubleshooting. Adding a test payload feature would allow users to simulate trigger conditions directly within the platform and view the resulting output or response, thereby improving confidence in configurations and reducing the likelihood of production errors.