feat: Add CategoryDto with properties and a static fromEntity conversion method.

src/category/dto/category.dto.ts

@@ -3,6 +3,7 @@ import { MenuItemDto } from "src/item/dto/menu-item.dto";
 export class CategoryDto {
   id: string;
   name: string;
+  image: string;
   restaurantId: string;
   items?: MenuItemDto[];
 
@@ -10,6 +11,7 @@ export class CategoryDto {
     return {
       id: entity.id,
       name: entity.name,
+      image: entity.image,
       restaurantId: entity.restaurantId,
       items: entity.items?.map(MenuItemDto.fromEntity) ?? [],
     };