v0.1.10

• OpenRouter support: new provider (OPENROUTER_API_KEY, openrouter/auto default, or any model id). Picks it in the init wizard or via
  px redgreen init -p openrouter.
• Any OpenAI-compatible endpoint (Groq, Together, LM Studio, llama.cpp, ...) via "provider": "openai" + "baseUrl" - no new provider needed. Custom endpoints use the chat-completions wire protocol; OpenAI proper keeps its native API.
• README provider table + note; wizard gains the OpenRouter row.
• New tests: openrouter env-key chat, labeled missing-key error, custom baseUrl, provider/env wiring pin; model-defaults regression pin now covers openrouter/auto.