Python SDK invalid typings stub

[cstruct]

The typings stub has multiple issues that generates a lot of errors on usage.

1. Old version of pyo3-stub-gen with multiple bugs
2. Invalid order of attrs on IggyClient impl causing:
   2.1. Stubs get a new method instead of __new__ not providing typing for class initialization.
   2.2. Stubs do not respect #(pyos(signature = (...))) not exposing configured defaults.
3. PyIdentifier is exposed as a Python Enum which is not how it is used, it should be a Union of str and int.