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.

components/Header.tsx

@@ -23,6 +23,7 @@ export default function Header() {
     { href: `/${locale}/market`, label: t("market") },
     { href: `/${locale}/sobre`, label: t("about") },
     { href: `/${locale}/precos`, label: t("prices") },
+    { href: `/${locale}/apoiar`, label: "Apoiar", highlight: true },
   ];
 
   return (
@@ -41,14 +42,16 @@ export default function Header() {
         {/* Desktop Navigation */}
         <NavigationMenu className="hidden md:flex">
           <NavigationMenuList>
-            {links.map(({ href, label }) => (
+            {links.map(({ href, label, highlight }) => (
               <NavigationMenuItem key={href}>
                 <NavigationMenuLink asChild>
                   <Link
                     href={href}
                     className={cn(
                       navigationMenuTriggerStyle(),
-                      "bg-transparent"
+                      "bg-transparent",
+                      highlight &&
+                        "bg-primary text-primary-foreground hover:bg-primary/90"
                     )}
                   >
                     {label}