optional context links per value

[gak]

For a certain field you can create links based on the value.

        {
          "field": "trace_id",
          "transforms": [
            {
              "link": {
                "match": "(.*)",
                "title": "View trace_id in Jaeger",
                "href": "https://jaeger/trade_id=$1",
                "icon": "mdi-eye-settings"
              }
            }
          ]
        }
      ],