feat: enhance SEO capabilities and add All Tools page

- Updated generate-seo-assets script to create separate sitemap files for static, blog, tools, and SEO pages.
- Introduced render-seo-shells script to generate HTML shells for SEO pages with dynamic metadata.
- Added All Tools page with categorized tool listings and SEO metadata.
- Updated routing to include /tools path and linked it in the footer.
- Enhanced SEOHead component to remove unused keywords and improve OpenGraph metadata.
- Updated translations for tools hub in English, Arabic, and French.
- Refactored SEO-related utility functions to support new structured data formats.

frontend/src/components/layout/Footer.tsx

@@ -92,6 +92,12 @@ export default function Footer() {
               >
                 {t('common.terms')}
               </Link>
+              <Link
+                to="/tools"
+                className="text-sm text-slate-500 transition-colors hover:text-primary-600 dark:text-slate-400 dark:hover:text-primary-400"
+              >
+                {t('common.allTools')}
+              </Link>
               <Link
                 to="/about"
                 className="text-sm text-slate-500 transition-colors hover:text-primary-600 dark:text-slate-400 dark:hover:text-primary-400"