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

types/item.ts

@@ -4,6 +4,7 @@ export interface TibiaItem {
   id: string;
   name: string;
   image: string;
+  alt?: string;
   category:
     | "weapon"
     | "armor"