Render @property-@name.setter pattern for rw properties in stubgenc

Feature

Currently, stubgen renders the readwrite properties as a plain class field with inferred type. e.g.

in a pybind11 module

cls.def_property("my_property", &MyClass::GetProperty, &MyClass::SetProperty);

will result in

class MyClass:
    my_property: int

Could it be possible to render a @property-@name.setter pair instead, like:

class MyClass:
    @property
    def my_property(self) -> int: ...
    @my_property.setter
    def my_property(self, val: int) -> None: ...

Pitch

This way can more clearly reflect the fact that it is a property. I'm happy to help create a PR for this.

Start by locating stubgenc's current handling of readwrite properties and inspect how inferred class fields are emitted. The work is done when the generated stub uses the requested @property and @name.setter pair, with the getter and setter annotations shown in the issue.