chore: initial import of standalone agentscope project

examples/functionality/stream_printing_messages/README.md

@@ -0,0 +1,28 @@
+# Stream Printing Messages
+
+The AgentScope agent is designed to communicate with the user and the other agents by passing messages explicitly.
+However, we notice the requirements that obtain the printing messages from the agent in a streaming manner.
+Therefore, in example we demonstrate how to gather and yield the printing messages from a single agent and
+multi-agent systems in a streaming manner.
+
+
+## Quick Start
+
+Run the following command to see the streaming printing messages from the agent.
+Note the messages with the same ID are the chunks of the same message in accumulated manner.
+
+- For single-agent:
+
+```bash
+python single_agent.py
+```
+
+- For multi-agent:
+
+```bash
+python multi_agent.py
+```
+
+> Note: The example is built with DashScope chat model. If you want to change the model in this example, don't forget
+> to change the formatter at the same time! The corresponding relationship between built-in models and formatters are
+> list in [our tutorial](https://doc.agentscope.io/tutorial/task_prompt.html#id1)