feat: move the prompt to role module

[imotai]

PR-Codex overview

This PR focuses on updating the code in the og_roles module.

Detailed summary:

• Added a new role module.
• Updated the chat function in llama_client.py to include a default value for the stop parameter.
• Updated the run_task function in agent_api_server.py for better code readability.
• Added a new test case in tokenizer_test.py.
• Updated the create_new_memory_with_default_prompt function in base_agent.py for better code readability.
• Updated the extract_message function in base_agent.py for better code readability.
• Updated the setup.py file to include package information.
• Updated the FUNCTION_EXECUTE and FUNCTION_DIRECT_MESSAGE variables in prompt.py.
• Added a new test case in base_agent.py.
• Updated the llama_agent.py file for better code readability.

The following files were skipped due to too many changes: agent/src/og_agent/llama_agent.py

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