refactor(Container): simplify container component and remove size prop

Remove size variants from Container component and set a default max-width
Update all instances where Container was used with size prop to use default

src/components/Footer.tsx

@@ -21,7 +21,7 @@ export default function Footer({ lang: propLang }: FooterProps) {
   const t = useTranslations(lang);
   return (
     <footer className="border-t border-purple-500/10 py-6 bg-gradient-to-b from-background to-muted/20 backdrop-blur-sm">
-      <Container size="sm">
+      <Container>
         <motion.div
           className="flex flex-col md:flex-row justify-between items-center"
           initial={{ opacity: 0, y: 20 }}