dsh-yorha-ui: NieR:Automata-Style Industrial Terminal Theme

The `dsh-yorha-ui` theme plugin for DeepSeek Harness (DSH) is an open-source theme designed to transform the DSH web interface into an industrial aesthetic inspired by *NieR: Automata*. It features a sand- and charcoal-based color palette, square geometric structures, and hard-edged border design, comprehensively restyling the workspace, editor, and navigation while automatically adapting to appearance mode. Installation and updates are performed via terminal commands. The plugin is built with Node.js, has no external dependencies, and does not include original game artwork.