refactor(core): move app para src e padroniza estrutura

src/features/auth/components/auth-header.tsx

@@ -0,0 +1,15 @@
+import { cn } from "@/shared/utils/ui";
+
+interface AuthHeaderProps {
+	title: string;
+}
+
+export function AuthHeader({ title }: AuthHeaderProps) {
+	return (
+		<div className={cn("flex flex-col gap-1.5")}>
+			<h1 className="text-xl font-semibold tracking-tight text-card-foreground">
+				{title}
+			</h1>
+		</div>
+	);
+}