B2B-88: add starter kit structure and elements

packages/features/auth/src/components/auth-layout.tsx

@@ -0,0 +1,24 @@
+export function AuthLayoutShell({
+  children,
+  Logo,
+}: React.PropsWithChildren<{
+  Logo?: React.ComponentType;
+}>) {
+  return (
+    <div
+      className={
+        'flex h-screen flex-col items-center justify-center' +
+        ' bg-background lg:bg-muted/30 gap-y-10 lg:gap-y-8' +
+        ' animate-in fade-in slide-in-from-top-16 zoom-in-95 duration-1000'
+      }
+    >
+      {Logo ? <Logo /> : null}
+
+      <div
+        className={`bg-background flex w-full max-w-[23rem] flex-col gap-y-6 rounded-lg px-6 md:w-8/12 md:px-8 md:py-6 lg:w-5/12 lg:px-8 xl:w-4/12 xl:gap-y-8 xl:py-8`}
+      >
+        {children}
+      </div>
+    </div>
+  );
+}