fix(oauth): build the connect confirmation from the EMCN auth package

Staging's #9792 imports @sim/auth-ui, which the EMCN split replaced with @sim/emcn-auth.

Author: waleedlatif1

apps/sim/app/oauth/connect/connect-confirmation.tsx

@@ -1,7 +1,8 @@
 'use client'
 
 import { useState } from 'react'
-import { AuthIdentity, AuthButton as Chip } from '@sim/auth-ui'
+import { AuthButton as Chip } from '@sim/emcn-auth/button'
+import { AuthIdentity } from '@sim/emcn-auth/identity'
 import { isApiClientError } from '@/lib/api/client/errors'
 import { requestJson } from '@/lib/api/client/request'
 import { startCredentialConnectionContract } from '@/lib/api/contracts/credentials'