dsh-plugin-choice-refresh: Add "Regenerate" and "More" Features to DSH Choice Cards

`dsh-plugin-choice-refresh` is a new choice-card plugin for DSH, maintained by Pasumao. By injecting two buttons, “Refresh Options” and “More Options,” at the bottom of the native choice card, the plugin addresses issues with fixed or insufficient model options. When a user clicks either button, the system injects a specific prompt instructing the model to regenerate or supplement the options. The plugin requires no configuration, supports both Chinese and English, and is compatible with the new DSH protocol as well as multiple interface components, aiming to improve the flexibility with which agents guide user decisions.