docs: replace api document with view on github

Author: so1ve

docs/index.md

@@ -13,8 +13,8 @@ hero:
       text: Getting Started
       link: /getting-started
     - theme: alt
-      text: API Reference (Not available yet)
-      link: /
+      text: View on GitHub
+      link: https://github.com/clercjs/clerc
 
 features:
   - title: Plugin System

docs/zh/index.md

@@ -13,8 +13,8 @@ hero:
       text: 快速开始
       link: /zh/getting-started
     - theme: alt
-      text: API 参考（暂不可用）
-      link: /zh/
+      text: 在 GitHub 上查看
+      link: https://github.com/clercjs/clerc
 
 features:
   - title: 插件系统