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]/sobre/page.tsx

@@ -1,17 +1,34 @@
 import Header from "@/components/Header";
 import { UnderConstruction } from "@/components/under-construction";
 import { getTranslations } from "next-intl/server";
+import type { Metadata } from "next";
 
 export async function generateMetadata({
   params,
 }: {
   params: Promise<{ locale: string }>;
-}) {
+}): Promise<Metadata> {
   const { locale } = await params;
-  const t = await getTranslations({ locale, namespace: "underConstruction" });
+
+  const titles = {
+    pt: "Sobre - Nossa Missão e História",
+    en: "About - Our Mission and History",
+  };
+
+  const descriptions = {
+    pt: "Conheça o Tibia Trade, o marketplace multi-servidor mais seguro para negociação de itens. Sistema escrow, transparência total e comunidade ativa.",
+    en: "Learn about Tibia Trade, the most secure multi-server marketplace for item trading. Escrow system, total transparency and active community.",
+  };
+
   return {
-    title: t("about.title"),
-    description: t("about.description"),
+    title: titles[locale as keyof typeof titles],
+    description: descriptions[locale as keyof typeof descriptions],
+    keywords: [
+      "sobre tibia trade",
+      "história tibia trade",
+      "missão tibia trade",
+      "marketplace tibia",
+    ],
   };
 }