dsh-espanol: DeepSeek Harness Spanish Localization Plugin

`dsh-espanol` is a Spanish localization plugin for the DeepSeek Harness Web GUI, maintained by the community and following an opt-in principle. The plugin supports 29 UI namespaces, includes 718 translated strings, and provides automatic browser language detection. Installation requires running the specified command with pnpm and then restarting the session. The plugin preserves English technical terms but has limitations, including non-persistent preferences (in v1) and some untranslated menu descriptions. It is suitable for developers who prefer Spanish.