feat: Add Protobuf definitions for Network Membership service

- Introduced `networkmembership.proto` with RPC methods for retrieving user network tree, statistics, and position.
- Implemented HTTP annotations for gRPC transcoding in the service methods.
- Added support for Google API annotations in `annotations.proto` and `http.proto`.
- Created `ConfigureServices.cs` to register FluentValidation for the Protobuf services.
- Updated project file to include necessary dependencies for gRPC and Protobuf.

src/FrontOffice.BFF.Application/DiscountShopCQ/Commands/RemoveFromDiscountCart/RemoveFromDiscountCartCommand.cs

@@ -0,0 +1,18 @@
+namespace FrontOffice.BFF.Application.DiscountShopCQ.Commands.RemoveFromDiscountCart;
+
+/// <summary>
+/// حذف محصول از سبد خرید تخفیفی
+/// </summary>
+public record RemoveFromDiscountCartCommand : IRequest<RemoveFromDiscountCartResponseDto>
+{
+    /// <summary>
+    /// شناسه محصول
+    /// </summary>
+    public long ProductId { get; init; }
+}
+
+public class RemoveFromDiscountCartResponseDto
+{
+    public bool Success { get; set; }
+    public string Message { get; set; } = string.Empty;
+}

src/FrontOffice.BFF.Application/DiscountShopCQ/Commands/RemoveFromDiscountCart/RemoveFromDiscountCartCommandHandler.cs

@@ -0,0 +1,32 @@
+using CMSMicroservice.Protobuf.Protos.DiscountShoppingCart;
+
+namespace FrontOffice.BFF.Application.DiscountShopCQ.Commands.RemoveFromDiscountCart;
+
+public class RemoveFromDiscountCartCommandHandler : IRequestHandler<RemoveFromDiscountCartCommand, RemoveFromDiscountCartResponseDto>
+{
+    private readonly IApplicationContractContext _context;
+    private readonly ICurrentUserService _currentUserService;
+
+    public RemoveFromDiscountCartCommandHandler(IApplicationContractContext context, ICurrentUserService currentUserService)
+    {
+        _context = context;
+        _currentUserService = currentUserService;
+    }
+
+    public async Task<RemoveFromDiscountCartResponseDto> Handle(RemoveFromDiscountCartCommand request, CancellationToken cancellationToken)
+    {
+        var userId = _currentUserService.UserId ?? throw new UnauthorizedAccessException("User not authenticated");
+
+        var response = await _context.DiscountCart.RemoveFromCartAsync(new RemoveFromCartRequest
+        {
+            UserId = userId,
+            ProductId = request.ProductId
+        }, cancellationToken: cancellationToken);
+
+        return new RemoveFromDiscountCartResponseDto
+        {
+            Success = response.Success,
+            Message = response.Message
+        };
+    }
+}