feat: start adding pwa

packages/website/src/components/Analytics.astro

@@ -0,0 +1,25 @@
+---
+import { assertSecret } from '@blitzkit/core';
+
+const PUBLIC_GOOGLE_TAG_MANAGER_ID = assertSecret(
+  import.meta.env.PUBLIC_GOOGLE_TAG_MANAGER_ID,
+);
+---
+
+<script
+  is:inline
+  async
+  src={`https://www.googletagmanager.com/gtag/js?id=${PUBLIC_GOOGLE_TAG_MANAGER_ID}`}
+></script>
+
+<script is:inline define:vars={{ PUBLIC_GOOGLE_TAG_MANAGER_ID }}>
+  window.dataLayer = window.dataLayer || [];
+
+  function gtag() {
+    dataLayer.push(arguments);
+  }
+
+  gtag('js', new Date());
+
+  gtag('config', PUBLIC_GOOGLE_TAG_MANAGER_ID);
+</script>