Zod: add to @orval/zod support of anyOf/allOf/oneOf in requestBody

[danyadanch]

What are the steps to reproduce this issue?

1. Use schema like this:

{
    "openapi": "3.1.0",
    "info": {
        "title": "Luca API",
        "version": "0.0.1",
        "description": ""
    },
    "paths": {
        "/api/sheets/transactions/": {
            "post": {
                "operationId": "createTransaction",
                "summary": "Create",
                "parameters": [],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                },
                "tags": [
                    "sheets/transactions"
                ],
                "requestBody": {
                    "content": {
                        "application/json": {
                            "schema": {
                                "anyOf": [
                                    {
                                        "$ref": "#/components/schemas/CreateTransactionSchema"
                                    },
                                    {
                                        "$ref": "#/components/schemas/CreateTransactionTransferSchema"
                                    }
                                ],
                                "title": "Schema"
                            }
                        }
                    },
                    "required": true
                }
            }
        }
    },
    "components": {
        "schemas": {
            "CreateTransactionSchema": {
                "properties": {
                    "type": {
                        "$ref": "#/components/schemas/TransactionType"
                    },
                    "amount": {
                        "anyOf": [
                            {
                                "type": "number"
                            },
                            {
                                "type": "string"
                            }
                        ],
                        "title": "Amount"
                    },
                    "account_id": {
                        "format": "uuid",
                        "title": "Account Id",
                        "type": "string"
                    },
                    "accounting_item": {
                        "anyOf": [
                            {
                                "format": "uuid",
                                "type": "string"
                            },
                            {
                                "type": "null"
                            }
                        ],
                        "title": "Accounting Item"
                    },
                    "counterparty": {
                        "anyOf": [
                            {
                                "format": "uuid",
                                "type": "string"
                            },
                            {
                                "type": "null"
                            }
                        ],
                        "title": "Counterparty"
                    },
                    "commentary": {
                        "anyOf": [
                            {
                                "type": "string"
                            },
                            {
                                "type": "null"
                            }
                        ],
                        "default": "",
                        "title": "Commentary"
                    },
                    "payment_date": {
                        "format": "date",
                        "title": "Payment Date",
                        "type": "string"
                    },
                    "accrual_date": {
                        "format": "date",
                        "title": "Accrual Date",
                        "type": "string"
                    }
                },
                "required": [
                    "type",
                    "amount",
                    "account_id",
                    "payment_date",
                    "accrual_date"
                ],
                "title": "CreateTransactionSchema",
                "type": "object"
            },
            "CreateTransactionTransferSchema": {
                "properties": {
                    "type": {
                        "$ref": "#/components/schemas/TransactionType"
                    },
                    "amount": {
                        "anyOf": [
                            {
                                "type": "number"
                            },
                            {
                                "type": "string"
                            }
                        ],
                        "title": "Amount"
                    },
                    "account_id": {
                        "format": "uuid",
                        "title": "Account Id",
                        "type": "string"
                    },
                    "commentary": {
                        "anyOf": [
                            {
                                "type": "string"
                            },
                            {
                                "type": "null"
                            }
                        ],
                        "default": "",
                        "title": "Commentary"
                    },
                    "payment_date": {
                        "format": "date",
                        "title": "Payment Date",
                        "type": "string"
                    },
                    "accrual_date": {
                        "format": "date",
                        "title": "Accrual Date",
                        "type": "string"
                    },
                    "target_amount": {
                        "anyOf": [
                            {
                                "type": "number"
                            },
                            {
                                "type": "string"
                            }
                        ],
                        "title": "Target Amount"
                    },
                    "target_account_id": {
                        "format": "uuid",
                        "title": "Target Account Id",
                        "type": "string"
                    },
                    "target_payment_date": {
                        "format": "date",
                        "title": "Target Payment Date",
                        "type": "string"
                    },
                    "target_accrual_date": {
                        "format": "date",
                        "title": "Target Accrual Date",
                        "type": "string"
                    }
                },
                "required": [
                    "type",
                    "amount",
                    "account_id",
                    "payment_date",
                    "accrual_date",
                    "target_amount",
                    "target_account_id",
                    "target_payment_date",
                    "target_accrual_date"
                ],
                "title": "CreateTransactionTransferSchema",
                "type": "object"
            },
            "TransactionType": {
                "enum": [
                    "IN",
                    "EX",
                    "TRANSFER"
                ],
                "title": "TransactionType",
                "type": "string"
            }
        }
    },
    "servers": []
}

2. Config like this:

import { defineConfig } from 'orval';

export default defineConfig({
  basic: {
    output: {
      target: '../generated/zod',
      client: 'zod',
      clean: true,
    },
    input: {
      target: 'zod-anyof.json',
    },
  },
}); 

What happens?

I got empty zod file

What were you expecting to happen?

Zod file generated with optional two types

What versions are you using?

Package Version: 6.27.1