dsh-token-stat: DeepSeek Harness Token Usage Statistics Plugin

`dsh-token-stat` is a zero-dependency plugin for DeepSeek Harness that tracks cumulative token usage. It supports querying detailed records by model and date, and provides visualization dashboards, including donut charts and stacked bar charts. Data is stored in a separate directory and supports online editing. Users can view reports via tool calls on the settings page or in the dialog box, and the data persists after uninstallation.