text: Title: Feature: CLI publish command
  Body: User should be able to publish a test message right from the command line smth like this
  
  ```bash
  faststream publish main:app message topic
  ```
  
  Probably, all arguments after `main:app` can be interpreted as `broker.publish(*args)` and all `--topic=topicname` options can be interpreted as `broker.publish(**kwargs)`. Also, it should supports `--rpc` flag with systemout output to be suitable as a healthcheck container command.