refactor: rewrite useFlow and useStepConnection with RQ

packages/web/src/hooks/useFlow.js

@@ -0,0 +1,19 @@
+import { useQuery } from '@tanstack/react-query';
+
+import api from 'helpers/api';
+
+export default function useFlow(flowId) {
+  const query = useQuery({
+    queryKey: ['flow', flowId],
+    queryFn: async ({ signal }) => {
+      const { data } = await api.get(`/v1/flows/${flowId}`, {
+        signal,
+      });
+
+      return data;
+    },
+    enabled: !!flowId,
+  });
+
+  return query;
+}