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/sdks/providers/README.md

@@ -0,0 +1,50 @@
+# Providers
+(*providers*)
+
+## Overview
+
+Provider information endpoints
+
+### Available Operations
+
+* [list](#list) - List all providers
+
+## list
+
+List all providers
+
+### Example Usage
+
+<!-- UsageSnippet language="python" operationID="listProviders" method="get" path="/providers" -->
+```python
+from openrouter import OpenRouter
+import os
+
+
+with OpenRouter(
+    api_key=os.getenv("OPENROUTER_API_KEY", ""),
+) as open_router:
+
+    res = open_router.providers.list()
+
+    # Handle response
+    print(res)
+
+```
+
+### Parameters
+
+| Parameter                                                           | Type                                                                | Required                                                            | Description                                                         |
+| ------------------------------------------------------------------- | ------------------------------------------------------------------- | ------------------------------------------------------------------- | ------------------------------------------------------------------- |
+| `retries`                                                           | [Optional[utils.RetryConfig]](../../models/utils/retryconfig.md)    | :heavy_minus_sign:                                                  | Configuration to override the default retry behavior of the client. |
+
+### Response
+
+**[models.ListProvidersResponse](../../models/listprovidersresponse.md)**
+
+### Errors
+
+| Error Type                         | Status Code                        | Content Type                       |
+| ---------------------------------- | ---------------------------------- | ---------------------------------- |
+| errors.InternalServerResponseError | 500                                | application/json                   |
+| errors.OpenRouterDefaultError      | 4XX, 5XX                           | \*/\*                              |