dsh-wsl-open: Open WSL Paths in Windows

The dsh-wsl-open plugin identifies Linux absolute paths using CSS Highlight, converts them to Windows paths with `wslpath`, and invokes system commands to open files or folders. It restricts access to specific directories (such as home, workspace, and mnt), making it suitable for scenarios where the WSL filesystem is operated directly from a Windows environment. After installation, users can click dotted-underlined paths in replies to open files with their default application.