dsh-wsl-net: Diagnosing WSL Proxy and Connection Issues

`dsh-wsl-net` is a WSL network diagnostic tool for DeepSeek Harness. It helps resolve cases where a browser can reach a service but a process cannot connect, typically caused by proxy configuration or Node.js 24 behavior. This plugin provides environment variable reporting, process comparison, port probing, and service reachability testing, and generates remediation scripts. It supports injecting proxy configuration into child processes to rapidly identify and resolve network connectivity issues.