feat: add banner script loading for preview environment

shared/layouts/docs/default.html

@@ -196,5 +196,9 @@
 
 	<script src="/dist/js/tabler{% if environment != 'development' %}.min{% endif %}.js"></script>
 	<script src="/js/docs{% if environment != 'development' %}.min{% endif %}.js" defer></script>
+
+	{% if environment == 'preview' %}
+	<script src="https://scripts.tabler.io/banner.js" defer></script>
+	{% endif %}
 </body>
 </html>