fix(MultiSelect): enhance item handling and improve empty state display

- Update MultiSelect component to allow items to be optional or null, improving flexibility.
- Implement safe handling of items to prevent errors when items are not provided.
- Add a message to display when no items are available, enhancing user experience.
- Refactor rendering logic for selected items to maintain consistent styling.

src/hooks/queries/useCompaniesQueries.ts

@@ -140,7 +140,7 @@ export const useCreateCompanyCategory = (successCallback?: () => void) => {
       queryClient.invalidateQueries({
         queryKey: [API_ENDPOINTS.COMPANIES.CATEGORIES.READ_ALL],
       });
-      router.push("/companies/categories");
+      router.push("/company-categories");
     },
   });
 };