Created slice, store, and hooks. Started adding them into the calender component.

src/app/store.ts

@@ -0,0 +1,11 @@
+import { configureStore } from "@reduxjs/toolkit";
+import calenderReducer from "../features/calender/calender";
+
+export const store = configureStore({
+  reducer: {
+    calender: calenderReducer
+  }
+});
+
+export type AppDispatch = typeof store.dispatch;
+export type RootState = ReturnType<typeof store.getState>;