Add export to NATS

[nicolargo]

NATS is a simple, secure and performant communications system for digital systems, services and devices.

• https://github.com/nats-io/nats-server
• https://github.com/nats-io/nats.py (with persistance support via Jetstream)

[nicolargo]

For testbed: https://docs.nats.io/running-a-nats-service/nats_docker

[github-actions]

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