dsh-launcher: Create a Windows Desktop Shortcut for DSH Web

`dsh-launcher` is a DSH plugin designed to streamline the cumbersome startup process of DSH Web. By creating a shortcut on the Windows desktop, it enables direct access to the workbench with a double-click and supports intelligent status detection, port recognition, and automatic updates. The plugin uses PowerShell natively, requires no additional runtime, and operates safely without impacting DSH Web's native features. Users can install it via `dsh plugin` and customize the working directory, port, and shortcut properties through a configuration file.