dsh-wsl-browser: Open URLs in WSL with the Default Windows Browser

`dsh-wsl-browser` is a tool in the DeepSeek Harness suite that addresses the limitation of not being able to directly access Windows browsers from WSL. Through the `win_open_url` command, it opens a specified HTTP/HTTPS URL in the Windows default browser, allowing developers to conveniently inspect local services. The plugin supports configurable timeouts, but only for the http and https protocols; the file protocol is not supported.