fix: avoid rendering search bar if no content plugin is enabled

packages/logos-docusaurus-theme/src/client/theme/SearchBar/index.tsx

@@ -1,7 +1,11 @@
+import { useActivePlugin } from '@docusaurus/plugin-content-docs/lib/client/index.js'
 import React from 'react'
 import { SearchBar } from './SearchBar'
 
 const SearchBarWrapper: React.FC = () => {
+  const activePlugin = useActivePlugin()
+  if (!activePlugin) return <></>
+
   return typeof window === 'undefined' ? <></> : <SearchBar />
 }