✨ 推荐插件目录新增 dsh-docs-panel（全局文档） (#230)

- plugins-tabs.ts：追加 dsh-docs-panel Tab 条目（npm 包名 id、GitHub 仓库、
  安装命令先装 dsh-better-sidebar 再装本插件，与 dsh-sidebar-qa 同款硬依赖写法）
- locales.ts：新增 pluginDocsPanelDesc 的 zh/en 翻译

Co-authored-by: Menghuan1918 <menghuan2003@outlook.com>

src/client/plugins-tabs.ts

@@ -24,6 +24,15 @@ export const builtinTabPlugins: readonly PluginEntry[] = [
     // context consistent with the other entries.
     install: 'cd ~/.dsh && dsh plugin --profile web add "github:fuhefei/dsh-sentinel#v0.7.0"',
   },
+  {
+    id: 'dsh-docs-panel',
+    name: 'dsh-docs-panel 全局文档',
+    url: 'https://github.com/mlosun/dsh-docs-panel',
+    description: () => t('pluginDocsPanelDesc'),
+    // dsh-docs-panel hard-depends on dsh-better-sidebar (required peer), so
+    // the install line installs the prerequisite first, then the plugin.
+    install: 'cd ~/.dsh && dsh plugin --profile web add dsh-better-sidebar && dsh plugin --profile web add dsh-docs-panel',
+  },
   {
     id: 'dsh-git-remotes',
     name: 'dsh-git-remotes Git 远程',