Add local search to docs

Author: kaggis

docs/docusaurus.config.ts

@@ -99,6 +99,18 @@ navbar: {
       darkTheme: prismThemes.dracula,
     },
   } satisfies Preset.ThemeConfig,
+  themes: [
+    [
+      "@easyops-cn/docusaurus-search-local",
+      {
+        hashed: true,
+        language: ["en"],
+        highlightSearchTermsOnTargetPage: true,
+        explicitSearchResultPath: true,
+        indexBlog: false,
+      },
+    ],
+  ],
 };
 
 export default config;