dsh-desktop-launcher: A desktop launcher for dsh Web UI

dsh-desktop-launcher is a dsh plugin maintained by LvienOeria, designed to provide a simple desktop entry for macOS and Linux users, solving the tedious workflow of launching the Web UI directly via the terminal. Adhering to the MIT license, the plugin's core functionality is to generate a `dsh.app` on the macOS desktop or a `dsh.desktop` entry in the Linux application menu. Double-clicking these files launches the dsh Web UI and automatically opens the browser, without requiring the installation of additional terminal commands or modifications to the PATH environment variable. The plugin has zero dependencies, a package size of approximately 147 KB, includes built-in 1024px icons for `whale` and `whale-dark`, and supports customization.