Remove deprecated studio package and refactor agent integration
- Deleted the studio package, which is no longer in use, to streamline the codebase.
- Updated references in the agent and chat modules to utilize the new agent package instead of the deprecated neo package.
- Ensured that all related middleware and routing functionalities are now aligned with the agent architecture, enhancing overall system coherence.
- Replaced the Agent API with the Chat API, focusing on AI chat completions with full OpenAI client compatibility and real-time streaming capabilities.
- Updated routing to attach chat handlers instead of agent handlers, ensuring OAuth protection for all endpoints.
- Revised README documentation to reflect the new Chat API structure, including detailed descriptions of endpoints, features, and usage examples.
- Removed the deprecated agent files and their associated documentation to streamline the codebase.
