[Feature Request] Add support for NATS and Kafka

[AhmedAbouelkher]

Hi,

I've been playing with scheduler for quite some time now. I had excellent feedback. The tool is easy to use and straightforward to manage.

We are using NATS as our messaging broker and We want to trigger cronjob as NATS subject messages instead of HTTP requests.

Dkron has this feature but it lakes the simplicity of scheduler.