refactor(ui): Break SignUp into smaller components based on step (#3878)

Author: alexcarpenter

.changeset/curly-monkeys-sort.md

@@ -0,0 +1,2 @@
+---
+---

packages/ui/src/components/sign-up/index.tsx

@@ -1 +1,15 @@
-export { SignUpComponent as SignUp } from './sign-up';
+import { Root as SignUpRoot } from '@clerk/elements/sign-up';
+
+import { SignUpContinue } from './steps/continue';
+import { SignUpStart } from './steps/start';
+import { SignUpVerifications } from './steps/verifications';
+
+export function SignUp() {
+  return (
+    <SignUpRoot>
+      <SignUpStart />
+      <SignUpVerifications />
+      <SignUpContinue />
+    </SignUpRoot>
+  );
+}