Add opt-out of cookies/gdpr

Add to the last item before the `` tag:

However, the colors of text,border & background need to be tweaked to knotx colors

```html

+
+
+window.addEventListener("load", function(){
+window.cookieconsent.initialise({
+ "palette": {
+ "popup": {
+ "background": "#64386b",
+ "text": "#ffcdfd"
+ },
+ "button": {
+ "background": "transparent",
+ "text": "#f8a8ff",
+ "border": "#f8a8ff"
+ }
+ },
+ "content": {
+ "message": "This website uses anonymous cookies to ensure we provide you the best experience. ",
+ "link": "Opt out!",
+ "href": "https://tools.google.com/dlpage/gaoptout/"
+ }
+})});
+
```

Locate the website template or page entry point whose final content appears before the closing tag. Add the cookieconsent stylesheet, script, and initialization shown in the issue, then adjust the popup and button colors to Knot.x colors and verify the generated site displays the opt-out prompt.

Written by the indexing model from the issue text.