feat: update mermaid code fences usage

assets/js/highlight.js

@@ -18,7 +18,7 @@ hljs.registerLanguage('yaml', yaml);
 hljs.registerLanguage('md', markdown);
 
 document.addEventListener('DOMContentLoaded', () => {
-  document.querySelectorAll('pre code').forEach((block) => {
+  document.querySelectorAll('pre code:not(.language-mermaid)').forEach((block) => {
     hljs.highlightElement(block);
   });
 });

content/docs/prologue/quick-start.md

@@ -13,6 +13,12 @@ weight: 110
 toc: true
 ---
 
+```js
+function myFunction(p1, p2) {
+  return p1 * p2;   // The function returns the product of p1 and p2
+}
+```
+
 ## Flow
 
 ### Shortcode