dsh-provider-badge: Display the Current Model Provider Icon Next to the Model Selector

`dsh-provider-badge` is a client plugin for DeepSeek Harness that addresses the difficulty of identifying provider sources when switching models by displaying the corresponding provider icon—such as a whale, GO, ZEN, or its initials—next to the model selector. The plugin subscribes to real-time storage state changes and supports DPI adaptation. Users can install it via CLI or manual configuration, and adjust the icon's style and position in the source code or console.