feat(auth): add better-auth core wiring for admin and db

apps/admin/src/app/login/page.tsx

@@ -0,0 +1,18 @@
+import { isAdminRegistrationEnabled } from "@cms/auth/server"
+import { redirect } from "next/navigation"
+
+import { resolveRoleFromServerContext } from "@/lib/access-server"
+
+import { LoginForm } from "./login-form"
+
+export const dynamic = "force-dynamic"
+
+export default async function LoginPage() {
+  const role = await resolveRoleFromServerContext()
+
+  if (role) {
+    redirect("/")
+  }
+
+  return <LoginForm allowRegistration={isAdminRegistrationEnabled()} />
+}