Python: [BREAKING] update to v1.0.0 (#5062)

* updates to final deprecated pieces and versions

* fix mypy

* fix readme links

python/samples/02-agents/chat_client/built_in_chat_clients.py

@@ -88,7 +88,7 @@ async def main(client_name: ClientName = "openai_chat") -> None:
     """Run a basic prompt using a selected built-in client."""
     client = get_client(client_name)
 
-    message = Message("user", text="What's the weather in Amsterdam and in Paris?")
+    message = Message("user", contents=["What's the weather in Amsterdam and in Paris?"])
     stream = os.getenv("STREAM", "false").lower() == "true"
     print(f"Client: {client_name}")
     print(f"User: {message.text}")

python/samples/02-agents/chat_client/chat_response_cancellation.py

@@ -31,7 +31,7 @@ async def main() -> None:
 
     try:
         task = asyncio.create_task(
-            client.get_response(messages=[Message(role="user", text="Tell me a fantasy story.")])
+            client.get_response(messages=[Message(role="user", contents=["Tell me a fantasy story."])])
         )
         await asyncio.sleep(1)
         task.cancel()

python/samples/02-agents/chat_client/custom_chat_client.py

@@ -98,7 +98,7 @@ class EchoingChatClient(BaseChatClient[OptionsT]):
             response_text = f"{response_text} {suffix}"
         stream_delay_seconds = float(options.get("stream_delay_seconds", 0.05))
 
-        response_message = Message(role="assistant", text=response_text)
+        response_message = Message(role="assistant", contents=[response_text])
 
         response = ChatResponse(
             messages=[response_message],
@@ -150,7 +150,7 @@ async def main() -> None:
     # Use the chat client directly
     print("Using chat client directly:")
     direct_response = await echo_client.get_response(
-        [Message(role="user", text="Hello, custom chat client!")],
+        [Message(role="user", contents=["Hello, custom chat client!"])],
         options={
             "uppercase": True,
             "suffix": "(CUSTOM OPTIONS)",