feat: customize README for Tibia Trade marketplace and enhance page accessibility

- Rewrote README.md to describe the Tibia Trade project, including features, setup instructions, technologies, and SEO keywords in Portuguese
- Removed "Pagodera" from thank you page text for rebranding
- Added role and aria-label to main element in home page for better accessibility
- Added metadata generation with localized titles and descriptions to prices page for improved SEO and user experience

components/share-button.tsx

@@ -7,8 +7,8 @@ export function ShareButton() {
   const handleShare = () => {
     if (navigator.share) {
       navigator.share({
-        title: "Tibia Trade Pagodera",
-        text: "Conheça o marketplace mais seguro para negociar itens no servidor Pagodera!",
+        title: "Tibia Trade",
+        text: "Conheça o marketplace multi-servidor mais seguro para negociar itens de Tibia!",
         url: window.location.origin,
       });
     } else {