List agents

curl --request GET \
  --url https://api.case.dev/agent/v1/agents \
  --header 'Authorization: Bearer <token>'

{
  "agents": [
    {
      "id": "<string>",
      "name": "<string>",
      "description": "<string>",
      "model": "<string>",
      "vaultIds": [
        "<string>"
      ],
      "isActive": true,
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ]
}