Add Google Analytics to webpages (#934)

## Description

Add Google Analytics to docs and website

This can only be tested in production for docs but it looks like the HTML does the right thing.

## Type of change

- [x] 🌻 Feature


## Test Plan

- [x] 💪 Manual

docs/docusaurus.config.js

@@ -46,6 +46,9 @@ const config = {
             'https://github.com/alcionai/corso/tree/main/docs',
         },
         blog: false,
+        googleAnalytics: {
+          trackingID: 'G-4EXT1PY6KC',
+        },
         theme: {
           customCss: require.resolve('./src/css/custom.scss'),
         },

website/src/index.html

@@ -8,7 +8,17 @@
         <link href="assets/libs/tiny-slider/tiny-slider.css" rel="stylesheet">
         @@include("partials/head-css.html")
     </head>
-    
+
+    <!-- Google tag (gtag.js) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id=G-YXBFPQZ05N"></script>
+    <script>
+        window.dataLayer = window.dataLayer || [];
+        function gtag(){dataLayer.push(arguments);}
+        gtag('js', new Date());
+
+        gtag('config', 'G-YXBFPQZ05N');
+    </script>
+
     @@include("partials/body.html")
         <!-- Loader Start -->
         <!-- <div id="preloader">