dsh-weniger-theme: Weniger Theme Plugin for DSH Web GUI

The dsh-weniger-theme is an extension plugin for the DSH Web GUI, inspired by Dieter Rams' design philosophy, providing a warm-toned Braun-style theme. It achieves a unified visual style across light and dark modes by remapping design tokens, converging component corner radii to 0-4px, flattening shadows, and recoloring elements such as user bubbles and code blocks. Additionally, the plugin adds a chip in the footer to display the "Ten Principles of Good Design" panel. The plugin supports installation via the `dsh plugin` command from a package manager or GitHub repository, or manual configuration of `cordis.patch.yml` in the profile directory. Users should note that upgrading to version 0.1.4 or above is necessary to ensure the theme loads correctly, and the source code should be reviewed for security. The project is licensed under MIT and depends on R