Refactor: separete the generic framework code from stub geration

[oseasandrepro]

Inside srpc_sutb_util.py should have only operations for reflection to handle the files .py _interface.py

I am thinking of using the factory pattern to generate stubs for each language.

Look at an example below from How to Use the Factory Pattern in Python - A Practical Guide

class EmailNotifier:
    def send(self, message):
        return f"Sending email: {message}"

class SMSNotifier:
    def send(self, message):
        return f"Sending SMS: {message}"

class PushNotifier:
    def send(self, message):
        return f"Sending push notification: {message}"

class NotificationFactory:
    @staticmethod
    def create_notifier(notifier_type):
        if notifier_type == "email":
            return EmailNotifier()
        elif notifier_type == "sms":
            return SMSNotifier()
        elif notifier_type == "push":
            return PushNotifier()
        else:
            raise ValueError(f"Unknown notifier type: {notifier_type}")

Use enums, look at enum documentation enum in Python

[oseasandrepro]

Be aware that you also need to solve this bug : #81