move move frontend to progress-test

app/javascript/services/store/index.ts

@@ -0,0 +1,11 @@
+import { combineReducers, createStore } from "redux";
+
+import { reducer as unsavedChanges } from "./unsavedChanges/reducer";
+
+const rootReducer = combineReducers({
+  unsavedChanges,
+});
+
+export type RootState = ReturnType<typeof store.getState>;
+
+export const store = createStore(rootReducer);