List Custom Harnesses

curl --request GET \
  --url https://api.example.com/v1/custom-harnesses/

{
  "results": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "created_at": 123,
      "updated_at": 123,
      "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "description": "<string>",
      "agent_name": "<string>",
      "policy_ids": [
        "3c90c3cc-0d44-4b50-8888-8dd25736052a"
      ],
      "persona_ids": [
        "3c90c3cc-0d44-4b50-8888-8dd25736052a"
      ]
    }
  ],
  "total": 123
}