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",