Add new Python async files and classes

Author: grongierisc

demo/python/async/bo.py

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+from grongier.pex import BusinessOperation
+from msg import MyMessage
+
+import time
+
+class MyBO(BusinessOperation):
+    def on_message(self, request):
+        print(f"Received message: {request.message}")
+        time.sleep(1)
+        return MyMessage(message=f"Hello, {request.message}")
+
+        

demo/python/async/bp.py

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+from grongier.pex import BusinessProcess
+from msg import MyMessage
+
+
+class MyBP(BusinessProcess):
+
+    def on_message(self, request):
+        msg_one = MyMessage(message="Message1")
+        msg_two = MyMessage(message="Message2")
+
+        self.send_request_async("Python.MyBO", msg_one,completion_key="1")
+        self.send_request_async("Python.MyBO", msg_two,completion_key="2")
+
+    def on_response(self, request, response, call_request, call_response, completion_key):
+        if completion_key == "1":
+            self.response_one = call_response
+        elif completion_key == "2":
+            self.response_two = call_response
+
+    def on_complete(self, request, response):
+        self.log_info(f"Received response one: {self.response_one.message}")
+        self.log_info(f"Received response two: {self.response_two.message}")
+
+

demo/python/async/msg.py

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+from grongier.pex import Message
+from dataclasses import dataclass
+
+@dataclass
+class MyMessage(Message):
+    message : str = None

demo/python/async/settings.py

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+from bo import MyBO
+from bp import MyBP
+
+CLASSES = {
+    "Python.MyBO": MyBO,
+    "Python.MyBP": MyBP,
+}