dsh-token-price: Display token cost and account balance for DeepSeek Harness Web chat interface

`dsh-token-price` is a plugin for the DeepSeek Harness (DSH) Web chat interface, designed to address the issue where token usage generated by requests is visible but the associated costs and balance are not. Maintained by `spoon-man569` and licensed under the MIT license, its core features include real-time display in the UI of token costs per response turn, total session costs, and estimated RMB amounts based on the `USD/CNY` exchange rate. Additionally, it invokes the official interface to display account balances and marks unknown model routes as "unpriced" to avoid misunderstanding. Installation requires executing the `dsh plugin` command via pnpm, and configuration options cover the balance interface address, API key environment variables, and refresh intervals. The plugin supports dual emphasis on the host service and browser display...