dsh-high-fee-alert: DeepSeek Harness Peak Fee Reminder Plugin

The `dsh-high-fee-alert` plugin is used to monitor the “peak” hours of the DeepSeek API and prevent users from incurring additional fees during peak periods. On startup, it fetches the latest pricing documentation, and when a peak period is detected, it displays a 710×430 alert window on screen with “OK” (exit process) and “Continue” buttons. It also provides HTTP endpoints for querying the status and terminating the service. Users can install it via npm or a local file, with configuration items located in `cordis.patch.yml`, allowing customization of peak time windows and workday restrictions. The plugin requires Node.js 20, and the author has stated that it is currently unmaintained.