feat: add donation support with footer card and navigation

Add donation functionality to encourage community support, including a footer card on the home page, a highlighted "Apoiar" link in the header, and comprehensive English messages for the donation section to promote transparency and user engagement.

app/[locale]/page.tsx

@@ -6,6 +6,7 @@ import { HowItWorks } from "@/components/sections/how-it-works";
 import { FeaturedItems } from "@/components/sections/featured-items";
 import { MarketOffers } from "@/components/sections/market-offers";
 import { MarketStats } from "@/components/sections/market-stats";
+import { DonationFooterCard } from "@/components/donation-footer-card";
 
 export default function Home() {
   return (
@@ -20,6 +21,13 @@ export default function Home() {
         <MarketStats />
       </main>
       <EscrowExplanation />
+
+      {/* Card de Doação no Footer */}
+      <section className="py-16 bg-muted/20">
+        <div className="container mx-auto px-4">
+          <DonationFooterCard />
+        </div>
+      </section>
     </div>
   );
 }