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

* updates to final deprecated pieces and versions

* fix mypy

* fix readme links

python/packages/declarative/agent_framework_declarative/_workflows/_executors_agents.py

@@ -640,7 +640,7 @@ class InvokeAzureAgentExecutor(DeclarativeActionExecutor):
 
         # Add user input to conversation history first (via state.append only)
         if input_text:
-            user_message = Message(role="user", text=input_text)
+            user_message = Message(role="user", contents=[input_text])
             state.append(messages_path, user_message)
 
         # Get conversation history from state AFTER adding user message
@@ -717,7 +717,7 @@ class InvokeAzureAgentExecutor(DeclarativeActionExecutor):
                 "Agent '%s': No messages in response, creating simple assistant message",
                 agent_name,
             )
-            assistant_message = Message(role="assistant", text=accumulated_response)
+            assistant_message = Message(role="assistant", contents=[accumulated_response])
             state.append(messages_path, assistant_message)
 
         # Store results in state - support both schema formats:

python/packages/declarative/agent_framework_declarative/_workflows/_executors_tools.py

@@ -588,7 +588,9 @@ class BaseToolExecutor(DeclarativeActionExecutor):
                 messages=[
                     Message(
                         role="assistant",
-                        text=f"Function '{function_name}' was rejected: {response.reason or 'No reason provided'}",
+                        contents=[
+                            f"Function '{function_name}' was rejected: {response.reason or 'No reason provided'}"
+                        ],
                     )
                 ],
             )