Add chinese docs (#17954)

* add docs chinese i18n

* fix some broken links

* update some i18n

* update chinese docs

* add chinese community docs

* Change docs i18n chinese label

docs/src/components/LanguageAlert/index.jsx

@@ -0,0 +1,25 @@
+import React, { useEffect, useState } from 'react';
+import { useLocation } from '@docusaurus/router';
+import styles from './styles.module.css';
+
+export default function LanguageAlert() {
+  const [showAlert, setShowAlert] = useState(false);
+  const { pathname } = useLocation();
+
+  useEffect(() => {
+    const userLanguage = navigator?.language || 'en';
+    const isChineseUser = userLanguage.includes('zh');
+    setShowAlert(isChineseUser);
+    
+  }, [pathname]);
+
+  if (!showAlert) return null;
+
+  return (
+    <div className={styles.alert}>
+      <span>检测到您的主要语言为中文，您可以访问由中文社区翻译的</span>
+      <a href={'https://docs.frigate-cn.video'+pathname}>中文文档</a>
+      <span> 以获得更好的体验</span>
+    </div>
+  );
+}