feat: add tools from the Python client

[sarahwooders]

Please describe the purpose of this pull request. Add the ability to create tools from the client, and to create agents with tools (without specifying a preset):

def print_tool(message: str):
    """ 
    Args: 
        message (str): The message to print.

    Returns:
        str: The message that was printed.

    """
    print(message)
    return message

tool = client.create_tool(print_tool, tags=["extras"])
agent_state = client.create_agent(tools=[tool.name]))

How to test poetry run pytest -s tests/test_tools.py

Have you tested this PR? Yes