WIP - OpenRouter support and related refactoring

providers/__init__.py

@@ -3,6 +3,8 @@
 from .base import ModelCapabilities, ModelProvider, ModelResponse
 from .gemini import GeminiModelProvider
 from .openai import OpenAIModelProvider
+from .openai_compatible import OpenAICompatibleProvider
+from .openrouter import OpenRouterProvider
 from .registry import ModelProviderRegistry
 
 __all__ = [
@@ -12,4 +14,6 @@ __all__ = [
     "ModelProviderRegistry",
     "GeminiModelProvider",
     "OpenAIModelProvider",
+    "OpenAICompatibleProvider",
+    "OpenRouterProvider",
 ]