refactor(inventory): remove unused fields from InventoryItem and update related DTOs

frontend/app/kvitto/page.tsx

@@ -1,5 +0,0 @@
-import { redirect } from 'next/navigation';
-
-export default function KvittoPage() {
-  redirect('/import?tab=kvitto');
-}

frontend/app/recipes/import/page.tsx

@@ -1,5 +0,0 @@
-import { redirect } from 'next/navigation';
-
-export default function Page() {
-  redirect('/import?tab=recept');
-}

frontend/features/inventory/types.ts

@@ -52,17 +52,11 @@ export type InventoryItem = {
   quantity: string;
   unit: string;
   location: string | null;
-  priority: number | null;
   purchaseDate: string | null;
   opened: boolean | null;
-  shelfNote: string | null;
   suitableFor: string | null;
-  isOnSale: boolean | null;
-  priceLevel: number | null;
   bestBeforeDate: string | null;
   brand: string | null;
-  proteinType: string | null;
-  isLeftover: boolean | null;
   comment: string | null;
   createdAt: string;
   updatedAt: string;