dsh-wsl-hostsvc: Detecting Local LLM Services on the Windows Host from WSL

The dsh-wsl-hostsvc plugin is designed to address the manual network configuration challenges involved in accessing Windows-host LLM services from WSL. It uses the `host_reach` tool to detect local OpenAI-compatible servers (such as Ollama, LM Studio, and vLLM) and automatically provides the `baseURL`, configuration snippet, and model ID. Users can specify a service using the `profile` parameter, then restart `dsh web` after installation and start a new session to use it. The plugin supports multi-IP detection and includes usage recommendations, such as context window matching.