List event schemas

curl --request GET \
  --url https://api.togai.com/event_schema \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "name": "ride_completed",
      "description": "Cab ride completed",
      "version": 1,
      "status": "DRAFT",
      "attributes": [
        {
          "name": "distance"
        },
        {
          "name": "time"
        }
      ],
      "dimensions": [
        {
          "name": "city"
        },
        {
          "name": "ride_type"
        }
      ],
      "usageMetersCount": 10
    }
  ],
  "nextToken": "eyJsYXN0SXRlbUlkIjogInN0cmluZyIsICJwYWdlU2l6ZSI6IDEwMCwgInNvcnRPcmRlciI6ICJhc2MifQ==",
  "context": {
    "pageSize": 10
  }
}