improvement(types): add types for the whole store

improves #43

src/app/shared/types/index.tsx

@@ -0,0 +1,16 @@
+/* eslint-disable import/prefer-default-export */
+import { Reducer } from 'redux';
+import { ProductsStateType } from '~/store/modules/products/types';
+
+export const PRODUCTS_NAMESPACE_KEY = 'PRODUCTS_NAMESPACE';
+
+export const INIT_DYNO_STATE = 'INIT_DYNO_STATE';
+
+export type FullStoreShape = {
+  [INIT_DYNO_STATE]: {};
+  [PRODUCTS_NAMESPACE_KEY]: ProductsStateType;
+};
+
+export type StoreShape = Partial<FullStoreShape>;
+export type NamespaceKey = keyof StoreShape;
+export type ReducerMap = Partial<{ [k in NamespaceKey]: Reducer<FullStoreShape[k]> }>;