feat: 品牌替换 + 启动优化 + AGENTS.md 模板定制

- 品牌替换：OpenCode/opencode → AirCoding/aircoding（16+ 文件）
- Logo ASCII art：修复 left/right 行数不匹配导致的启动崩溃
- 启动诊断：添加 OPENCODE_PRINT_TIMING 计时探针
- dev 模式默认 --pure 跳过外部插件加载
- AGENTS.md 模板：追加 AirCoding 多 Agent 专项段落
- architect prompt + plugin：强化 AGENTS.md 产出验证

packages/docs/docs.json

@@ -0,0 +1,53 @@
+{
+  "$schema": "https://mintlify.com/docs.json",
+  "theme": "mint",
+  "name": "@opencode-ai/docs",
+  "colors": {
+    "primary": "#16A34A",
+    "light": "#07C983",
+    "dark": "#15803D"
+  },
+  "favicon": "/favicon-v3.svg",
+  "navigation": {
+    "tabs": [
+      {
+        "tab": "SDK",
+        "groups": [
+          {
+            "group": "Getting started",
+            "pages": ["index", "quickstart", "development"],
+            "openapi": "https://opencode.ai/openapi.json"
+          }
+        ]
+      }
+    ],
+    "global": {}
+  },
+  "logo": {
+    "light": "/logo/light.svg",
+    "dark": "/logo/dark.svg"
+  },
+  "navbar": {
+    "links": [
+      {
+        "label": "Support",
+        "href": "mailto:hi@mintlify.com"
+      }
+    ],
+    "primary": {
+      "type": "button",
+      "label": "Dashboard",
+      "href": "https://dashboard.mintlify.com"
+    }
+  },
+  "contextual": {
+    "options": ["copy", "view", "chatgpt", "claude", "perplexity", "mcp", "cursor", "vscode"]
+  },
+  "footer": {
+    "socials": {
+      "x": "https://x.com/mintlify",
+      "github": "https://github.com/mintlify",
+      "linkedin": "https://linkedin.com/company/mintlify"
+    }
+  }
+}