chore: Port over mission statement and gtag (#34262)

- [x] I have read [freeCodeCamp's contribution guidelines](https://github.com/freeCodeCamp/freeCodeCamp/blob/master/CONTRIBUTING.md).
- [x] My pull request has a descriptive title (not a vague title like `Update index.md`)
- [x] My pull request targets the `master` branch of freeCodeCamp.


Closes #18184

client/src/head/index.js

@@ -2,9 +2,10 @@ import favicons from './favicons';
 import meta from './meta';
 import mathjax from './mathjax';
 import sassjs from './sassjs';
+import scripts from './scripts';
 
 const metaAndStyleSheets = meta
-  .concat(favicons, mathjax, sassjs)
+  .concat(favicons, mathjax, sassjs, scripts)
   .map((element, i) => ({
     ...element,
     key: `meta-stylesheet-${i}`,