refactor: migrate legacy wire namespace to wrn

examples/auth-showcase/app/pages/otp.wrn

@@ -1,4 +1,4 @@
 page OtpSignInPage {
   seo { title = "Passwordless OTP sign-in" }
-  view { <main class="flex min-h-screen items-center justify-center bg-[var(--wire-color-bg)] p-4"><OtpSignIn method="email-otp" /></main> }
+  view { <main class="flex min-h-screen items-center justify-center bg-[var(--wrn-color-bg)] p-4"><OtpSignIn method="email-otp" /></main> }
 }