chore: update project branding from SaaS-PDF to Dociva

- Updated robots.txt to reflect new site name and sitemap URL.
- Modified sitemap.xml to change all URLs from saas-pdf.com to dociva.io.
- Changed storage key for site assistant in SiteAssistant.tsx.
- Updated SEOHead.tsx to change site name in meta tags.
- Translated app name and related text in Arabic, English, and French JSON files.
- Updated contact email in ContactPage.tsx, PrivacyPage.tsx, and TermsPage.tsx.
- Changed internal admin page title to reflect new branding.
- Updated pricing page meta description to reference Dociva.
- Adjusted Nginx configuration for new domain.
- Modified deployment script to reflect new branding.
- Updated sitemap generation script to use new domain.

frontend/src/pages/PricingPage.tsx

@@ -65,11 +65,11 @@ export default function PricingPage() {
     <>
       <SEOHead
         title={t('pages.pricing.title', 'Pricing')}
-        description={t('pages.pricing.metaDescription', 'Compare Free and Pro plans for SaaS-PDF. Get more file processing power, API access, and priority support.')}
+        description={t('pages.pricing.metaDescription', 'Compare Free and Pro plans for Dociva. Get more file processing power, API access, and priority support.')}
         path="/pricing"
         jsonLd={generateWebPage({
           name: t('pages.pricing.title', 'Pricing'),
-          description: t('pages.pricing.metaDescription', 'Compare Free and Pro plans for SaaS-PDF.'),
+          description: t('pages.pricing.metaDescription', 'Compare Free and Pro plans for Dociva.'),
           url: `${window.location.origin}/pricing`,
         })}
       />