docs: add Clarity analytics to VitePress head (#199)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: mohamedmansour

docs/.vitepress/config.js

@@ -8,6 +8,13 @@ export default {
   appearance: true,
   head: [
     ['link', { rel: 'icon', href: '/webui/favicon.ico' }],
+    ['script', { type: 'text/javascript' },
+      `(function(c,l,a,r,i,t,y){
+        c[a]=c[a]||function(){(c[a].q=c[a].q||[]).push(arguments)};
+        t=l.createElement(r);t.async=1;t.src="https://www.clarity.ms/tag/"+i;
+        y=l.getElementsByTagName(r)[0];y.parentNode.insertBefore(t,y);
+      })(window, document, "clarity", "script", "w8ppn3zr79");`
+    ],
   ],
   themeConfig: {
     logo: '/logo.svg',