Handle schema definition arrays about schema-registry-ui

[chdask]

Hi @teq0! Thanks for the issue. Yeap... it seems we don't handle the correctly arrays. We will update asap!

[teq0]

The fix works for displaying existing schemas but it gives a validation era if you try to add one via the UI.
Switching to curl mode, the generated curl command works from a command line, and it then displays just fine.

Here's the exact schema I just tried:

[
  {
    "type": "record",
    "name": "KafkaEventHeader",
    "namespace": "com.example.kafka.core",
    "doc": "Our standard kafka header",
    "fields": [
      {
        "name": "correlationId",
        "type": "string",
        "doc": "Unique identifier e.g. GUID that is passed to other events created from this one so that we can track across processes"
      },
      {
        "name": "processPath",
        "type": [
          "null",
          {
            "type": "array",
            "items": {
              "type": "record",
              "name": "ProcessPathElement",
              "doc": "Struct that contains info about each process step",
              "fields": [
                {
                  "name": "source",
                  "type": "string",
                  "doc": "Name of the processor that generated this event"
                },
                {
                  "name": "timestamp",
                  "type": "string"
                }
              ],
              "semVer": "1.0.0",
              "docURL": "https://avro.example.com/kafka/core/ProcessPathElement/1.0.0"
            }
          }
        ],
        "doc": "A breadcrumbs structure to help analyse the provenance of an event"
      }
    ],
    "semVer": "1.0.0",
    "docURL": "https://avro.example.com/kafka/core/KafkaEventHeader/1.0.0"
  },
  {
    "type": "record",
    "name": "test4001_value",
    "namespace": "com.example.customer",
    "doc": "A person with a favourite colour",
    "fields": [
      {
        "name": "header",
        "type": "com.example.kafka.core.KafkaEventHeader"
      },
      {
        "name": "userId",
        "type": "string"
      },
      {
        "name": "favoriteColour",
        "type": "string"
      }
    ],
    "semVer": "1.0.0",
    "docURL": "https://avro.example.com/kafka/customer/test4001-value/1.0.0"
  }
]

[cindymc]

Schemas with arrays are still not supported in the UI, so I'm not sure why this issue has been closed.