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/datacollection.md

@@ -0,0 +1,14 @@
+# DataCollection
+
+Data collection setting. If no available model provider meets the requirement, your request will return an error.
+- allow: (default) allow providers which store user data non-transiently and may train on it
+- deny: use only providers which do not collect user data.
+
+
+
+## Values
+
+| Name    | Value   |
+| ------- | ------- |
+| `DENY`  | deny    |
+| `ALLOW` | allow   |