docs: update theme

Author: mrholek

docs/layouts/_default/baseof.html

@@ -7,6 +7,11 @@
     {{/*  {{ partial "skippy" . }}  */}}
     {{ partial "sidebar" . }}
     <div class="wrapper flex-grow-1">
+      <div class="alert alert-light d-flex justify-content-center rounded-0 border-bottom">
+        <span class="me-3">If you like this project and want to help us, please give us a star ⭐️ on Github. ➡️</span>
+        <a class="github-button" href="https://github.com/coreui/coreui" data-size="large" aria-label="Star coreui/coreui on GitHub">Star</a>
+        <span class="ms-3">🙏</span>
+      </div>
       {{ partial "header" . }}
       {{ block "main" . }}
       {{ end }}

docs/layouts/partials/scripts.html

@@ -14,3 +14,6 @@
 {{- end }}
 
 <script src="{{ $docsJs.Permalink | relURL }}"></script>
+
+<!-- Place this tag in your head or just before your close body tag. -->
+<script async defer src="https://buttons.github.io/buttons.js"></script>