Allow us to specify which fields use Literals and which ones use Enums

[nbro10]

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

In most cases, I prefer to use Enums, because it's easier to inspect the enum values than inspecting the literals, as far as I know. So, I usually generate the code using enums. However, for a specific field of a model, I think I need to use a Literal, because this generated class is supposed to be the base class of other classes, which I may manually define, and inheritance doesn't work with enums, as far as I know.

To be concrete, let's say I have a generated class like this

class ALanguage(Enum):
    EN = "en"
    FR = "fr"
    ES = "es"
    ...

class A
    language: ALanguage 
    ...

Now, let's say I define

class BLanguage(Enum):
    EN = "en"

class B(A)
    language: BLanguage
    ...

I think this would be wrong inheritance because BLanguage doesn't inherit from ALanguage and even if I changed the code so that BLanguage(ALanguage), I think it's not allowed to redefine the enum options in enum subclasses. I want to restrict the languages in B, and ALanguage should be as general as possible, i.e. contain all possible languages, but I don't think this is possible with Enums because I don't think I can restrict the languages in BLanguage. So, in this specific case, I think Literal would be better, although I am also not sure how inheritance would work with literals, but I think it's allowed to restrict the possible values of the literal in subclasses.

Describe the solution you'd like

A way to specify that we want a specific field of a specific class to use literals instead of enums. For example, using a command-line parameter.

Describe alternatives you've considered

The current alternative is just to manually edit A after it's been generated, but this a pain