add support for websocket produce/consume command (#6017)
add support for websocket produce/consume command (#6017)

### Motivation
Support for websocket produce/consume command is added in https://github.com/apache/pulsar/pull/3835. The info is not updated in doc content.

### Modifications
Sync doc content with code update.

merlimat/pulsar,massakam/pulsar,yahoo/pulsar,massakam/pulsar,yahoo/pulsar,yahoo/pulsar,merlimat/pulsar,massakam/pulsar,merlimat/pulsar,yahoo/pulsar,merlimat/pulsar,massakam/pulsar,merlimat/pulsar,yahoo/pulsar,massakam/pulsar,merlimat/pulsar,massakam/pulsar,yahoo/pulsar