feat: add supports for open router (#1422)

pkg/provider/modelmgr/requesters/openrouterchatcmpl.py

@@ -0,0 +1,17 @@
+from __future__ import annotations
+
+import typing
+import openai
+
+from . import modelscopechatcmpl
+
+
+class OpenRouterChatCompletions(modelscopechatcmpl.ModelScopeChatCompletions):
+    """OpenRouter ChatCompletion API 请求器"""
+
+    client: openai.AsyncClient
+
+    default_config: dict[str, typing.Any] = {
+        'base_url': 'https://openrouter.ai/api/v1',
+        'timeout': 120,
+    }