Add Google Analytics to docs

Author: Andrew Welch

docs/docs/.vitepress/config.js

@@ -3,6 +3,13 @@ module.exports = {
     description: 'Documentation for the Transcoder plugin',
     base: '/docs/transcoder/',
     lang: 'en-US',
+    head: [
+        [
+            'script',
+            {},
+            "(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');ga('create', 'UA-69117511-1', 'auto');ga('require', 'displayfeatures');ga('send', 'pageview');"
+        ],
+    ],
     themeConfig: {
         repo: 'nystudio107/craft-transcoder',
         docsDir: 'docs/docs',