Initial commit: OpenRouter Python SDK

Auto-generated Python SDK for OpenRouter API, providing comprehensive client library with:
- Chat completions and streaming support
- Embeddings API
- Model and provider information
- API key management
- Analytics and usage tracking
- OAuth authentication flows
- Full type hints and error handling

docs/models/responsessearchcontextsize.md

@@ -0,0 +1,12 @@
+# ResponsesSearchContextSize
+
+Size of the search context for web search tools
+
+
+## Values
+
+| Name     | Value    |
+| -------- | -------- |
+| `LOW`    | low      |
+| `MEDIUM` | medium   |
+| `HIGH`   | high     |