chore: add google analytics

Author: Cnily03

vitepress.config.ts

@@ -35,6 +35,18 @@ export default defineConfig({
             linkText: '返回首页',
         },
 
+        head: [
+            [
+                'script',
+                { async: '', src: 'https://www.googletagmanager.com/gtag/js?id=G-Q89M3V8EG8' }
+            ],
+            [
+                'script',
+                {},
+                `window.dataLayer=window.dataLayer||[];function gtag(){dataLayer.push(arguments);}gtag('js',new Date());gtag('config','G-Q89M3V8EG8');`
+            ]
+        ],
+
         footer: {
             copyright: 'Copyright © NewStar CTF',
             message: `<a href="https://beian.miit.gov.cn/" target="_blank" style="text-decoration: none;">浙ICP备2023000643号-8</a>`,