Adding clarity analytics

[vhvb1989]

Adding clarity analytics

Since we are generating the site with docusaurous, we can't directly set a projectId into the index.html header. Instead, we need to use a plugin which should create the script like:

<script type="text/javascript">
    (function(c,l,a,r,i,t,y){
        c[a]=c[a]||function(){(c[a].q=c[a].q||[]).push(arguments)};
        t=l.createElement(r);t.async=1;t.src="https://www.clarity.ms/tag/"+i;
        y=l.getElementsByTagName(r)[0];y.parentNode.insertBefore(t,y);
    })(window, document, "clarity", "script", "kgcjy0d3wp");
</script>

[hemarina]

@vhvb1989 Closing this PR as we will use Adobe Analytics.