Add authentication

apps/builder/components/auth/AuthSwitcher.tsx

@@ -0,0 +1,26 @@
+import React from 'react'
+import { NextChakraLink } from '../nextChakra/NextChakraLink'
+import { Text } from '@chakra-ui/react'
+
+type Props = {
+  type: 'register' | 'signin'
+}
+export const AuthSwitcher = ({ type }: Props) => (
+  <>
+    {type === 'signin' ? (
+      <Text>
+        Don't have an account?{' '}
+        <NextChakraLink href="/register" color="blue.500" textDecor="underline">
+          Sign up for free
+        </NextChakraLink>
+      </Text>
+    ) : (
+      <Text>
+        Already have an account?{' '}
+        <NextChakraLink href="/signin" color="blue.500" textDecor="underline">
+          Sign in
+        </NextChakraLink>
+      </Text>
+    )}
+  </>
+)