Add definition of prebuiltui #2091

Job	Run time
setup	3s
test (./examples/with-multiple-email-sign-in)	6h 0m 13s
test (./examples/with-svelte-react-thirdpartyemailpassword)	4m 24s
test (./examples/with-update-email-post-verification)	5m 22s
test (./examples/with-netlify)	5m 7s
test (./examples/with-hash-router)	3m 12s
test (./examples/with-multifactorauth-recovery-codes)	5m 11s
test (./examples/with-legacy-2fa)	5m 26s
test (./examples/with-localstorage)	3m 16s
test (./examples/with-one-login-per-subdomain)	5m 17s
test (./examples/with-emailpassword-vercel)	4m 46s
test (./examples/with-thirdpartyemailpassword-passwordless)	4m 48s
test (./examples/with-sign-in-up-split-emailpassword)	4m 38s
test (./examples/with-account-linking)	5m 36s
test (./examples/with-phone-password)	6m 20s
test (./examples/with-cli-login)	4m 30s
test (./examples/with-emailverification-with-otp)	4m 42s
test (./examples/with-multifactorauth-phone-chooser)	7m 15s
test (./examples/with-no-session-on-sign-up-thirdpartyemailpassword)	4m 31s
test (./examples/with-phone-password-mfa)	6m 17s
test (./examples/with-emailverification-then-password-thirdpartyemailpassword)	4m 42s
test (./examples/with-i18next)	4m 40s
	7h 40m 16s

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