title: How to add Suggestion Chips through Fulfillment for the Dialogflow Messenger integration?
body: <p>So I have the Dialogflow Messenger embedded in a website and want to add some Suggestion chips. It's easy through the <em>Custom Payload</em> Response type and they show up just fine.
  But how do I add them through fulfillment?</p>
  <p>I currently have a custom webhook setup and the idea is to have something like this:</p>
  <pre><code>if (x) {
    agent.add('blablabla');
    agent.add(new Suggestion('One');
  } else {
    agent.add('blablabla');
    agent.add(new Suggestion('Two');
  }
  </code></pre>
  <p><em>new Suggestion</em> doesn't work though, so is there another way of doing this?
  I was thinking about something like this:</p>
  <pre><code>agent.add(new Payload(
    &quot;richContent&quot;: [
      [
        {
          &quot;options&quot;: [
            {
              &quot;text&quot;: &quot;One&quot;
            },
            {
              &quot;text&quot;: &quot;Two&quot;
            }
          ],
          &quot;type&quot;: &quot;chips&quot;
        }
      ]
    ]));
  </code></pre>
  <p>Essentially trying to insert the Custom Payload directly into the response JSON, if that makes any sense. But yeah no idea how to actually do it. Anyone know how?</p>