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/sections/how-it-works.tsx

@@ -50,7 +50,15 @@ export function HowItWorks() {
           <h2 className="text-4xl font-bold mb-4">{t("title")}</h2>
           <p className="text-lg text-muted-foreground max-w-2xl mx-auto">
             Descubra como funciona nossa plataforma de trading segura e
-            eficiente
+            eficiente.{" "}
+            <a href="/market" className="text-primary hover:underline">
+              Explore o mercado
+            </a>{" "}
+            ou conheça nosso{" "}
+            <a href="#escrow" className="text-primary hover:underline">
+              sistema de escrow
+            </a>
+            .
           </p>
         </div>