dsh-wsl-wslconfig: Parse .wslconfig and Suggest a DSH :3081 Relay

`dsh-wsl-wslconfig` is a network configuration tool in the DeepSeek Harness (DSH) suite, designed to resolve mismatches between WSL2 network modes and the DSH :3081 relay service. The plugin parses the Windows `.wslconfig` file in read-only mode to check mirrored network or memory settings and provides recommendations for using the standard relay port, helping developers avoid connection issues. It requires DSH version ≥ 0.1.2 and provides diagnostics and guidance only, without modifying system files.