feat: Update CategoriesSection to fetch products and categories on co…

…mponent mount

- Add useEffect hook to CategoriesSection component to fetch products and categories on component mount
- Update categories.tsx to import fetchProducts and fetchCategories from ProductSlice and categorySlice respectively
- Remove duplicate import statement for useAppSelector from '@/app/hooks'

src/pages/Home.tsx

@@ -5,7 +5,7 @@ function Home() {
   return (
     <main className=" relative w-full h-auto p-2 bg-violeteBg lg:p-10 md:p-10">
       <div>
-        {/* <HelloSection /> */}
+        <HelloSection />
         <CategoriesSection />
       </div>
     </main>