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

app/[locale]/page.tsx

@@ -13,7 +13,7 @@ export default function Home() {
     <div className="min-h-screen">
       <Header />
       <EscrowBanner />
-      <main>
+      <main role="main" aria-label="Página principal do Tibia Trade">
         <HeroSection />
         <HowItWorks />
         <FeaturedItems />