feat(auth): enterprise authentication and user management

frontend/athena/app/api/logout/route.ts

@@ -0,0 +1,18 @@
+import { NextRequest, NextResponse } from "next/server";
+
+import { clearAuthCookie } from "@/lib/server/hermes";
+import { assertSameOrigin } from "@/lib/server/request-guards";
+
+export async function POST(request: NextRequest) {
+  const originError = assertSameOrigin(request);
+
+  if (originError) {
+    return originError;
+  }
+
+  const response = NextResponse.json({ ok: true });
+
+  clearAuthCookie(response);
+
+  return response;
+}