feat: Implement Discount Product and Shopping Cart functionalities

- Added UpdateDiscountProductCommandValidator for validating discount product updates.
- Created GetDiscountProductByIdQuery and its handler for retrieving discount product details by ID.
- Implemented GetDiscountProductsQuery and handler for fetching a list of discount products with filtering options.
- Developed AddToCartCommand and handler for adding products to the shopping cart.
- Implemented ClearCartCommand and handler for clearing the shopping cart.
- Created RemoveFromCartCommand and handler for removing items from the cart.
- Added UpdateCartItemCountCommand and handler for updating the quantity of items in the cart.
- Developed GetUserCartQuery and handler for retrieving the user's shopping cart details.
- Implemented Product Tag functionalities including assigning tags to products, creating, updating, and deleting tags.
- Added queries for fetching all tags and products by tag.

src/BackOffice.BFF.Application/Common/Interfaces/IApplicationContractContext.cs

@@ -6,14 +6,20 @@ using CMSMicroservice.Protobuf.Protos.UserOrder;
 using CMSMicroservice.Protobuf.Protos.UserRole;
 using CMSMicroservice.Protobuf.Protos.Products;
 using CMSMicroservice.Protobuf.Protos.ProductImages;
-using CMSMicroservice.Protobuf.Protos.ProductGallerys;
+using CMSMicroservice.Protobuf.Protos.ProductGalleries;
 using CMSMicroservice.Protobuf.Protos.Category;
-using CMSMicroservice.Protobuf.Protos.PruductCategory;
+using CMSMicroservice.Protobuf.Protos.ProductCategory;
 using BackOffice.BFF.Commission.Protobuf;
 using BackOffice.BFF.NetworkMembership.Protobuf;
 using BackOffice.BFF.ClubMembership.Protobuf;
 using BackOffice.BFF.Configuration.Protobuf;
 using FMSMicroservice.Protobuf.Protos.FileInfo;
+using CMSMicroservice.Protobuf.Protos.DiscountProduct;
+using CMSMicroservice.Protobuf.Protos.DiscountCategory;
+using CMSMicroservice.Protobuf.Protos.DiscountShoppingCart;
+using CMSMicroservice.Protobuf.Protos.DiscountOrder;
+using CMSMicroservice.Protobuf.Protos.Tag;
+using CMSMicroservice.Protobuf.Protos.ProductTag;
 
 namespace BackOffice.BFF.Application.Common.Interfaces;
 
@@ -26,10 +32,10 @@ public interface IApplicationContractContext
     PackageContract.PackageContractClient Packages { get; }
     ProductsContract.ProductsContractClient Products { get; }
     ProductImagesContract.ProductImagesContractClient ProductImages { get; }
-    ProductGallerysContract.ProductGallerysContractClient ProductGallerys { get; }
+    ProductGalleriesContract.ProductGalleriesContractClient ProductGalleries { get; }
     RoleContract.RoleContractClient Roles { get; }
     CategoryContract.CategoryContractClient Categories { get; }
-    PruductCategoryContract.PruductCategoryContractClient ProductCategories { get; }
+    ProductCategoryContract.ProductCategoryContractClient ProductCategories { get; }
     UserAddressContract.UserAddressContractClient UserAddress { get; }
     UserContract.UserContractClient Users { get; }
     UserOrderContract.UserOrderContractClient UserOrders { get; }
@@ -40,6 +46,16 @@ public interface IApplicationContractContext
     NetworkMembershipContract.NetworkMembershipContractClient NetworkMemberships { get; }
     ClubMembershipContract.ClubMembershipContractClient ClubMemberships { get; }
     ConfigurationContract.ConfigurationContractClient Configurations { get; }
+    
+    // Discount Shop System (Phase 9)
+    DiscountProductContract.DiscountProductContractClient DiscountProducts { get; }
+    DiscountCategoryContract.DiscountCategoryContractClient DiscountCategories { get; }
+    DiscountShoppingCartContract.DiscountShoppingCartContractClient DiscountShoppingCarts { get; }
+    DiscountOrderContract.DiscountOrderContractClient DiscountOrders { get; }
+    
+    // Tag Management System
+    TagContract.TagContractClient Tags { get; }
+    ProductTagContract.ProductTagContractClient ProductTags { get; }
 
     #endregion
 }