CLI usability: operations need convenient help option too

[domain@localhost:9999 /] :read-operation-description(name="upload-deployment-url")
{
    "outcome" => "success",
    "result" => {
        "operation-name" => "upload-deployment-url",
        "description" => "Indicates that the deployment content available at the included URL should be added to the deployment content repository. Note that this operation does not indicate the content should be deployed into the runtime.",
        "request-properties" => {"url" => {
            "type" => STRING,
            "description" => "The URL at which the deployment content is available for upload to the domain's or standalone server's deployment content repository.. Note that the URL must be accessible from the target of the operation (i.e. the Domain Controller or standalone server).",
            "required" => true,
            "min-length" => 1,
            "nillable" => false
        }},
        "reply-properties" => {
            "type" => BYTES,
            "description" => "The hash of managed deployment content that has been uploaded to the domain's or standalone server's deployment content repository.",
            "min-length" => 20,
            "max-length" => 20,
            "nillable" => false
        }
    }
}
[domain@localhost:9999 /]