first commit

calcom/packages/platform/atoms/hooks/useGetCityTimezones.ts

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+import { useQuery } from "@tanstack/react-query";
+
+import http from "../lib/http";
+
+const useGetCityTimezones = () => {
+  const pathname = `/timezones`;
+
+  const { isLoading, data } = useQuery({
+    queryKey: ["city-timezones"],
+    queryFn: () => {
+      return http?.get(pathname).then((res) => res.data);
+    },
+  });
+
+  return { isLoading, data };
+};
+
+export default useGetCityTimezones;