Release v0.0.9

What's Changed

• feat(model): introduce rate limiting and guardrail models with typed … by @OhYee in #19
• refactor(agui_protocol): remove copilotkit compatibility mode and sim… by @OhYee in #21
• feat(ci): 增加覆盖率测试 by @OhYee in #20
• Fix agui by @OhYee in #23
• Fix tool descriptor protocol by @OhYee in #26

Full Changelog: v0.0.8...v0.0.9