Adds the core logic for the OPAX agent, including the main agent file, a deployment script, and an MCP client. This provides the foundation for the new agent-based architecture.
Per the task in `docs/TODO.md`, this change runs `git update-index --chmod=+x` on all relevant `.sh` and `.py` files in the repository.
This prevents intermittent 'Permission denied' errors when scripts are run in CI/CD environments or after being edited via the GitHub web interface, which can strip file permissions.
