feat: 添加 opencode 模块和相关服务

src/modules/opencode/OpenCodePage.tsx

@@ -0,0 +1,11 @@
+import React from 'react'
+
+export const OpenCodePage: React.FC = () => {
+  return (
+    <div className="max-w-4xl mx-auto w-full px-14 py-12 pb-40">
+      <h1 className="text-2xl font-bold text-gray-800 dark:text-gray-200 mb-8 flex items-center gap-2">
+        OpenCode
+      </h1>
+    </div>
+  )
+}