feat: create project list (#671)

apps/client/src/common/hooks-query/useProjectList.ts

@@ -0,0 +1,24 @@
+import { useQuery } from '@tanstack/react-query';
+import { ProjectFileListResponse } from 'ontime-types';
+
+import { queryRefetchIntervalSlow } from '../../ontimeConfig';
+import { PROJECT_LIST } from '../api/apiConstants';
+import { getProjects } from '../api/ontimeApi';
+
+const placeholderProjectList: ProjectFileListResponse = {
+  files: [],
+  lastLoadedProject: '',
+};
+
+export function useProjectList() {
+  const { data, status } = useQuery({
+    queryKey: PROJECT_LIST,
+    queryFn: getProjects,
+    placeholderData: placeholderProjectList,
+    retry: 5,
+    retryDelay: (attempt: number) => attempt * 2500,
+    refetchInterval: queryRefetchIntervalSlow,
+    networkMode: 'always',
+  });
+  return { data: data ?? placeholderProjectList, status };
+}