refactor(fetch data state type): moved fetching state to abstraction cuz it's repeated few times

src/redux/drugs/drugs.types.ts

-import { Loading } from '@/types/loadingState';
+import { FetchDataState } from '@/types/fetchDataState';
 import { Drug } from '@/types/models';
 
-export type DrugsState = {
-  data: Drug[] | undefined;
-  loading: Loading;
-  error: Error;
-};
+export type DrugsState = FetchDataState<Drug[]>;

src/types/fetchDataState.ts

+import { Loading } from './loadingState';
+
+export type FetchDataState<T> = {
+  data: T | undefined;
+  loading: Loading;
+  error: Error;
+};