feat: add prerendering support and improve component imports

- Introduced a new PrerenderHome component for development testing.
- Updated App.js to conditionally render the PrerenderHome based on the route.
- Refactored several components to use ES6 import/export syntax for consistency.
- Enhanced AppContent to manage dynamic theming and added a development-only FAB for prerender testing.
- Minor adjustments to props in PrerenderCategory for clarity.

src/PrerenderSitemap.js

@@ -1,17 +1,11 @@
-const React = require('react');
-const { 
-  Box, 
-  AppBar, 
-  Toolbar, 
-  Container,
+import React from 'react';
+import {
   Typography,
   List,
   ListItem,
   ListItemText
-} = require('@mui/material');
-const Footer = require('./components/Footer.js').default;
-const { Logo, CategoryList } = require('./components/header/index.js');
-const LegalPage = require('./pages/LegalPage.js').default;
+} from '@mui/material';
+import LegalPage from './pages/LegalPage.js';
 
 const PrerenderSitemap = ({ categoryData }) => {
   // Process category data to flatten the hierarchy
@@ -134,4 +128,4 @@ const PrerenderSitemap = ({ categoryData }) => {
   return React.createElement(LegalPage, { title: 'Sitemap', content: content });
 };
 
-module.exports = { default: PrerenderSitemap }; 
+export default PrerenderSitemap;