feat: implement cart component with mock data and styling for improved cart functionality

src/app/shared/components/cart/cart.component.ts

@@ -0,0 +1,43 @@
+import { ChangeDetectionStrategy, Component, computed, input, output } from '@angular/core';
+import { CartItemAttribute, CartItemComponent } from '../cart-item/cart-item.component';
+
+export interface CartItemMock {
+  imageUrl: string | null;
+  product: string;
+  originalPrice: number | null;
+  discountedPrice: number;
+  discountPercentage: number | null;
+  attributes: CartItemAttribute[];
+  quantity: number;
+}
+
+@Component({
+  selector: 'app-cart',
+  standalone: true,
+  imports: [CartItemComponent],
+  templateUrl: './cart.component.html',
+  styleUrl: './cart.component.scss',
+  changeDetection: ChangeDetectionStrategy.OnPush
+})
+export class CartComponent {
+  readonly title = input<string>('CARRITO');
+  readonly showClose = input<boolean>(false);
+  readonly items = input<CartItemMock[]>([]);
+  readonly subtotal = input<number>(0);
+  readonly discount = input<number>(0);
+  readonly total = input<number>(0);
+  readonly backgroundColor = input<string>('#ffffff');
+
+  readonly closed = output<void>();
+
+  protected readonly formattedSubtotal = computed(() => this.formatCurrency(this.subtotal()));
+  protected readonly formattedDiscount = computed(() => this.formatCurrency(this.discount()));
+  protected readonly formattedTotal = computed(() => this.formatCurrency(this.total()));
+
+  private formatCurrency(value: number): string {
+    const rounded = Math.round(value);
+    const parts = rounded.toString().split('.');
+    parts[0] = parts[0].replace(/\B(?=(\d{3})+(?!\d))/g, '.');
+    return `$ ${parts.join(',')}`;
+  }
+}