add analytics for docs

apps/docs/src/pages/_app.tsx

@@ -1,5 +1,6 @@
 import type { AppProps } from 'next/app';
 import Head from 'next/head';
+import Script from 'next/script';
 
 import 'src/globals.css';
 
@@ -10,6 +11,31 @@ export default function App({ Component, pageProps }: AppProps) {
         <link rel="icon" href="/favicon.ico" />
       </Head>
       <Component {...pageProps} />
+      <Script
+        src="https://openpanel.dev/op.js"
+        async
+        defer
+        strategy="afterInteractive"
+      />
+      <Script
+        id="openpanel"
+        dangerouslySetInnerHTML={{
+          __html: `
+          window.op =
+            window.op ||
+            function (...args) {
+              (window.op.q = window.op.q || []).push(args);
+            };
+          window.op('ctor', {
+            url: 'https://api.openpanel.dev',
+            clientId: 'e884ef1b-52d7-430a-b2c5-69c432faeba4',
+            trackScreenViews: true,
+            trackOutgoingLinks: true,
+            trackAttributes: true,
+          });
+        `,
+        }}
+      />
     </>
   );
 }