feat: primitives (Wordmark, Container, CTA) with tests

components/primitives/Container.tsx

@@ -0,0 +1,5 @@
+import type { ElementType, ReactNode } from 'react';
+
+export function Container({ as: Tag = 'div', className = '', children }: { as?: ElementType; className?: string; children: ReactNode }) {
+  return <Tag className={`mx-auto w-full max-w-content px-6 md:px-12 ${className}`}>{children}</Tag>;
+}