dsh-codebuddy-auth: Using Tencent CodeBuddy as a Native LLM Provider for DeepSeek Harness

dsh-codebuddy-auth is a plugin that integrates Tencent CodeBuddy (IOA) into DeepSeek Harness, providing a native adapter and an out-of-the-box experience. It supports browser-based OAuth login, automatic token renewal, and model list synchronization, and exposes inference capabilities based on `/v3/config`. The plugin uses a dual-identity mechanism to bypass authentication restrictions and supports access to the international version. After installation, users can directly switch to CodeBuddy models in the DSH model selector, while the system automatically handles credentials, streaming, and model discovery.