feat: enhance JSDoc cheatsheet with quick reference section and improve layout

Add a dedicated quick reference section to the JSDoc cheatsheet, streamline the layout for better readability, and adjust sidebar and table of contents styles for consistency.

components/SyntaxHighlighter.tsx

@@ -32,7 +32,7 @@ const CodeHighlighter = ({ code, language = "javascript" }: SyntaxHighlighterPro
         wrapLines={true}
         wrapLongLines={true}
         PreTag={({ children, ...props }) => (
-          <pre className="!m-0 !p-0" {...props}>
+          <pre className="!m-0 p-2" {...props}>
             {children}
           </pre>
         )}