feat: 添加 OpenAI 和 Google 网关支持，移除旧配置

- 添加 OpenAI 网关支持并配置 GPT-5.2 及 GPT-5.2-Codex 模型，同时新增 Google 网关以支持 Gemini 3 Pro 高性能模型。
- 删除旧的代码片段提供者配置文件中定义的CLI代理API和Z.AI模型配置。

opencode.jsonc

@@ -26,8 +26,8 @@
     "websearch": "deny" // 禁用内置的 websearch 工具
   },
   "provider": {
-    "gateway": {
-      "name": "Gateway",
+    "anthropic-gateway": {
+      "name": "Anthropic Gateway",
       "npm": "@ai-sdk/anthropic",
       "options": {
         "baseURL": "http://10.0.1.1:8317/v1",
@@ -45,7 +45,17 @@
         },
         "claude-haiku-4-5": {
           "name": "Claude Haiku 4.5"
-        },
+        }
+      }
+    },
+    "google-gateway": {
+      "name": "Google Gateway",
+      "npm": "@ai-sdk/google",
+      "options": {
+        "baseURL": "http://10.0.1.1:8317/v1",
+        "apiKey": "{env:CPA_API_KEY}"
+      },
+      "models": {
         "gemini-3-pro-high": {
           "name": "Gemini 3 Pro (High)"
         },
@@ -63,6 +73,22 @@
         }
       }
     },
+    "openai-gateway": {
+      "name": "OpenAI Gateway",
+      "npm": "@ai-sdk/openai",
+      "options": {
+        "baseURL": "http://10.0.1.1:8317/v1",
+        "apiKey": "{env:CPA_API_KEY}"
+      },
+      "models": {
+        "gpt-5.2": {
+          "name": "GPT-5.2"
+        },
+        "gpt-5.2-codex": {
+          "name": "GPT-5.2-Codex"
+        }
+      }
+    },
     "GLM Coding": {
       "name": "Z.AI",
       "npm": "@ai-sdk/openai-compatible",