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/Header.tsx

@@ -33,7 +33,7 @@ export default function Header() {
         <div className="flex items-center gap-2">
           <Link href="/">
             <WordRotate
-              words={["Pagodera", "Tibia Trade"]}
+              words={["Tibia Trade"]}
               className="text-lg font-semibold tracking-tight hover:text-primary transition-colors"
             />
           </Link>