curl --request GET \
  --url https://api.open.cx/workflows/definitions \
  --header 'Authorization: Bearer <token>'

{
  "action_types": [
    {
      "type": "<string>",
      "name": "<string>",
      "description": "<string>",
      "category": "<string>",
      "icon": "<string>",
      "input_fields": [
        {
          "name": "<string>",
          "type": "<string>",
          "display_name": "<string>",
          "required": true,
          "description": "<string>"
        }
      ],
      "output_fields": [
        {
          "name": "<string>",
          "type": "<string>",
          "display_name": "<string>",
          "required": true,
          "description": "<string>"
        }
      ]
    }
  ],
  "trigger_types": [
    {
      "type": "<string>",
      "name": "<string>",
      "description": "<string>",
      "icon": "<string>"
    }
  ],
  "block_types": [
    {
      "type": "<string>",
      "name": "<string>",
      "description": "<string>"
    }
  ]
}