[C#] Support for format `date-time-local` to generate type `DateTime`

[rll-thg]

Is your feature request related to a problem? Please describe the problem.

Currently when an OpenAPI spec specifies a property with the format date-time-local
e.g.

"properties": {
    "foo": {
        "type": "string",
        "format": "date-time-local"
    }
}

It will generate a property with type string:

public string Foo { get; set; }

Client library/SDK language

Csharp

Describe the solution you'd like

Generate the property to type DateTime:

public string DateTime { get; set; }

Additional context

No response