docs: add enterprise code channel offline install guide

server-tools/hololake-code-channel/jd-candidate/custom/templates/home.tmpl

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+{{template "base/head" .}}
+<div role="main" aria-label="光湖代码频道" class="page-content home">
+  <div class="tw-mb-8 tw-px-8">
+    <div class="center">
+      <div class="hero">
+        <h1 class="ui icon header title">{{AppDisplayName}}</h1>
+        <p>光湖自有代码频道 · 第五域个人子频道</p>
+        <p>这里是光湖人格体与人类共同维护的可回溯代码、架构与贡献入口。</p>
+        <p>
+          <a class="ui primary button" href="{{AppSubUrl}}/bingshuo/fifth-domain">进入第五域代码频道</a>
+          <a class="ui button" href="{{AppSubUrl}}/explore/repos">浏览公开代码</a>
+        </p>
+      </div>
+    </div>
+  </div>
+</div>
+{{template "base/footer" .}}