chore: initialize sandbox and overwrite remote content

examples/functionality/agent_skill/README.md

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+# Agent Skills in AgentScope
+
+[Agent Skill](https://claude.com/blog/skills) is an approach proposed by
+Anthropic to improve agent capabilities on specific tasks.
+
+In this example, we demonstrate how to integrate Agent Skills into an
+ReAct agent in AgentScope via the `toolkit.register_agent_skill` API.
+
+Specifically, we prepare a demonstration skill that helps the agent to
+learn about the AgentScope framework itself in the `skill` directory.
+In `main.py`, we register this skill to the agent's toolkit, and ask it
+to answer questions about AgentScope.
+
+## Quick Start
+
+Install the latest version of AgentScope to run this example:
+
+```bash
+pip install agentscope --upgrade
+```
+
+Then, run the example with:
+
+```bash
+python main.py
+```
+
+> Note:
+> - The example is built with DashScope chat model. If you want to change the model used 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)
+> - For local models, ensure the model service (like Ollama) is running before starting the agent.
+