dsh-peak-pricing: DeepSeek Harness web plugin for displaying pricing periods and cost estimates

`dsh-peak-pricing` is a web plugin for DeepSeek Harness that monitors real-time pricing and costs. It differentiates peak and off-peak rates based on official DeepSeek pricing windows, displays a countdown and cumulative cost, and supports hovering over the interface to view trend charts. The plugin is compatible with models from multiple providers, calculates costs using incremental accumulation, and resolves display compatibility issues with other statistics plugins. Developers can install, configure, and update it via the command line, making it an effective tool for monitoring API call costs.