[POC] Added an 'html' property to field values, that renders the field value to HTML

[bdunogier]

{
  content(id: 1) {
    fields {
      fieldDefIdentifier
      value {
        html
      }
    }
  }
}

{
  "data": {
    "content": {
      "fields": [
        {
          "fieldDefIdentifier": "name",
          "value": {
            "html": "<span class=\"ezstring-field\">Welcome to eZ Platform</span>"
          }
        },
        {
          "fieldDefIdentifier": "short_description",
          "value": {
            "html": "<div class=\"ezrichtext-field\"><p>This is the clean install coming with eZ Platform. It&rsquo;s a barebone setup of the platform, an excellent foundation to build upon if you want to build from scratch. For more ready to go base designs or demo sites, please check the documentation.</p><p>&nbsp;</p>\n<!-- START app/Resources/views/ezrichtext_custom_tags/rawhtml.html.twig (:ezrichtext_custom_tags:rawhtml.html.twig) -->\n\n\n\n\n<blockquote class=\"twitter-tweet\" data-lang=\"fr\"><p lang=\"fr\" dir=\"ltr\">&Eacute;chelle de l'humour fran&ccedil;ais actuel : <br>- Alain <a href=\"https://twitter.com/hashtag/Chabat?src=hash&amp;ref_src=twsrc%5Etfw\">#Chabat</a> <br>- Alexandre <a href=\"https://twitter.com/hashtag/Astier?src=hash&amp;ref_src=twsrc%5Etfw\">#Astier</a> <br>- <br>-<br>-<br>-<br>-<br>-<br>-<br>-<br>-<br>-<br>-<br>-<br>-<br>... <br>-<br>-<br>-<br>-<br>-<br>- Un pot de fleurs <br>-<br>-<br>-<br>-<br>-<br>... <br>-<br>-<br>-<br>-<br>-<br>... <br>-<br>-<br>-<br>-<br>-<br><br>- <br>- <br>- Les Chevaliers du fiel <br>- Cyril <a href=\"https://twitter.com/hashtag/Hanouna?src=hash&amp;ref_src=twsrc%5Etfw\">#Hanouna</a> <br>- Laurent Wauquiez<a href=\"https://twitter.com/hashtag/BurgerQuiz?src=hash&amp;ref_src=twsrc%5Etfw\">#BurgerQuiz</a> <a href=\"https://twitter.com/hashtag/TPMP?src=hash&amp;ref_src=twsrc%5Etfw\">#TPMP</a> <a href=\"https://twitter.com/hashtag/seum?src=hash&amp;ref_src=twsrc%5Etfw\">#seum</a></p>&mdash; Caracole &iquest;' (@Caracole__) <a href=\"https://twitter.com/Caracole__/status/1039284870734852099?ref_src=twsrc%5Etfw\">10 septembre 2018</a></blockquote> <script async src=\"https://platform.twitter.com/widgets.js\" charset=\"utf-8\"></script>\n\n<!-- STOP app/Resources/views/ezrichtext_custom_tags/rawhtml.html.twig (:ezrichtext_custom_tags:rawhtml.html.twig) -->\n\n</div>\n"
          }
        },
        {
          "fieldDefIdentifier": "short_name",
          "value": {
            "html": "<span class=\"ezstring-field\">eZ Platform</span>"
          }
        },
        {
          "fieldDefIdentifier": "description",
          "value": {
            "html": "<div class=\"ezrichtext-field\"><h2>Welcome to eZ Platform</h2><p>Congratulations, you just installed eZ Platform. eZ Platform is the new generation Content Management Platform from eZ Systems and the eZ Community replacing eZ Publish, our previous software.</p><h3>Need some guidance?</h3><p>Check out the following resources:</p><h4><a href=\"https://doc.ez.no/display/USER/\">User Manual</a> for eZ Platform (and eZ Studio)</h4><h4><a href=\"https://doc.ezplatform.com/en/latest/\">Technical doc</a> for eZ Platform</h4><h4><a href=\"https://doc.ezplatform.com/en/latest/tutorials/platform_beginner/building_a_bicycle_route_tracker_in_ez_platform/\">eZ Platform</a> developer tutorial</h4><h4><a href=\"https://doc.ez.no/display/MAIN/Transitioning+from+eZ+Publish+to+eZ+Platform%3A+Feature+Comparison\">Comparison guide</a> between eZ Platform and eZ Publish Platform</h4><h3>Contribute to the project?</h3><p>Join the community:</p><h4><a href=\"https://github.com/ezsystems\">Github repositories</a> open to the public</h4><h4>Register to the community on <a href=\"https://discuss.ezplatform.com\">discuss.ezplatform.com</a>, the community site, to access forums, tutorials and blogs</h4><h4>Join the conversation on <a href=\"http://ez-community-on-slack.herokuapp.com/\">the eZ Community Slack</a></h4><p>Good luck!</p>\n</div>\n"
          }
        }
      ]
    }
  }
}