[BUG] [TypeScript Axios] Generator claims to support Date/DateTime but doesn't

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

I used the TypeScript Axios generator, which claims to support Date/DateTime. Looking at the generated code it's clearly it does not. It does no transformation of the data returned from the server over what Axios does so date time string don't get converted to Date objects.

openapi-generator version

6.0.1. Doesn't seem to be a regression.

OpenAPI declaration file content or url

Propertriatary but here's a sample of a date time field:

      "Channel": {
        "description": "A channel with project data.",
        "properties": {
          "created_at": {
            "format": "date-time",
            "title": "Created At",
            "type": "string"
          },
          "id": {
            "title": "Id",
            "type": "string"
          },
        },
        "required": [
          "created_at",
          "id",
        ],
        "title": "Channel",
        "type": "object"
      },

Generation Details

openapi-generator-cli generate -i ../backend/openapi.json -g typescript-axios -o ./generated/axios -c openapi-typescript-axios.config.json

The config just contains:

{
    "modelPropertyNaming": "original"
}

Steps to reproduce

Use the generator with a date-time field.

Related issues/PRs

Suggest a fix

Add the right transformations to the data returned by Axios.

Start with the TypeScript Axios generator and reproduce the issue using the provided OpenAPI schema and openapi-generator-cli command. Trace how date-time response fields are handled in the generated client. Done means generated clients convert date-time response strings into Date objects as the generator documentation claims.