List policy catalog

curl --request GET \
  --url https://agentgateway-admin.dev.neuraltrust.ai/v1/policies-catalog \
  --header 'Authorization: <api-key>'

{
  "groups": [
    {
      "items": [
        {
          "description": "<string>",
          "mandatory_stages": [],
          "name": "<string>",
          "settings_schema": {
            "fields": [
              {
                "default": "<unknown>",
                "description": "<string>",
                "enum": [
                  "<string>"
                ],
                "fields": "<array>",
                "item": "<unknown>",
                "key": "<string>",
                "key_options": [
                  "<string>"
                ],
                "label": "<string>",
                "required": true,
                "value": "<unknown>"
              }
            ]
          },
          "slug": "<string>",
          "supported_modes": [],
          "supported_stages": []
        }
      ],
      "type": "<string>"
    }
  ]
}