Support attachments (ri:attachment) specifying a page through an ri:page tag in macro parameters

  <ac:structured-macro ac:name="view-file" ac:schema-version="1" ac:macro-id="9bb20b83-bb71-4904-a874-ad9ce868996e">
    <ac:parameter ac:name="name">
      <ri:attachment ri:filename="image.pdf">
        <ri:page ri:space-key="MySpace" ri:content-title="My Page" />
      </ri:attachment>
  </ac:parameter>
  <ac:parameter ac:name="height">250</ac:parameter>
</ac:structured-macro>