Create function

curl --request POST \
  --url https://api.fluxend.app/functions/{schema} \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --header 'X-Project: <x-project>' \
  --data '{
  "definition": "<string>",
  "language": "<string>",
  "name": "<string>",
  "parameters": [
    {
      "name": "<string>",
      "type": "<string>"
    }
  ],
  "projectUUID": "<string>",
  "return_type": "<string>"
}'

{
  "content": {
    "dataType": "<string>",
    "definition": "<string>",
    "language": "<string>",
    "name": "<string>",
    "type": "<string>"
  },
  "errors": [
    "<string>"
  ],
  "metadata": "<any>",
  "success": true
}