feat(providers): add qoder-cn support for Qoder CN (qoder.com.cn)

tests/__baseline__/alias-baseline.json

@@ -187,6 +187,7 @@
     "perplexity-web": "perplexity-web",
     "poolside": "poolside",
     "qoder": "qd",
+    "qoder-cn": "qdcn",
     "sambanova": "samba",
     "siliconflow": "siliconflow",
     "tencent": "hunyuan",
@@ -280,6 +281,7 @@
     "perplexity-web",
     "poolside",
     "qd",
+    "qdcn",
     "qianfan",
     "recraft",
     "runwayml",

tests/__baseline__/providers-baseline.json

@@ -719,6 +719,16 @@
     "validateUrl": "https://ollama.com/api/tags",
     "format": "ollama"
   },
+  "qoder-cn": {
+    "baseUrl": "https://gateway.qoder.com.cn/algo/api/v2/service/pro/sse/agent_chat_generation",
+    "headers": {},
+    "timeoutMs": 120000,
+    "stallTimeoutMs": 120000,
+    "usage": {
+      "url": "https://openapi.qoder.com.cn/api/v2/quota/usage"
+    },
+    "format": "openai"
+  },
   "openai": {
     "baseUrl": "https://api.openai.com/v1/chat/completions",
     "forceStream": true,