feat(products): add reset functionality to delete all products and related data

backend/src/products/products.service.ts

@@ -381,4 +381,20 @@ export class ProductsService {
   async findAllTags() {
     return this.prisma.tag.findMany({ orderBy: { name: 'asc' } });
   }
+
+  async resetAll() {
+    await this.prisma.$transaction([
+      this.prisma.receiptAlias.deleteMany(),
+      this.prisma.inventoryConsumption.deleteMany(),
+      this.prisma.inventoryItem.deleteMany(),
+      this.prisma.pantryItem.deleteMany(),
+      this.prisma.nutrition.deleteMany(),
+      this.prisma.productTag.deleteMany(),
+      this.prisma.tag.deleteMany(),
+      this.prisma.userProduct.deleteMany(),
+      this.prisma.recipeIngredient.deleteMany(),
+      this.prisma.product.deleteMany(),
+    ]);
+    return { ok: true };
+  }
 }