Updates to examples in from_mcp docstrings to allow for easier out-of-the box usage including:

• use uv instead of uvx to remove the need to manually install pubmedclient in order to use pubmedmcp@0.1.3 and better isolating the tool usage
• pass required arg model to CodeAgent init to prevent TypeError: CodeAgent.__init__() missing 1 required positional argument: 'model'from arising with current implementation
• import and add init for model = InferenceClientModel() to pass to CodeAgent