Add validators and services for Product Galleries and Product Tags

- Implemented Create, Delete, Get, and Update validators for Product Galleries.
- Added Create, Delete, Get, and Update validators for Product Tags.
- Created service classes for handling Discount Categories, Discount Orders, Discount Products, Discount Shopping Cart, Product Categories, Product Galleries, and Product Tags.
- Each service class integrates with CQRS for command and query handling.
- Established mapping profiles for Product Galleries.

src/CMSMicroservice.Domain/Entities/Payment/ManualPayment.cs

@@ -0,0 +1,75 @@
+using CMSMicroservice.Domain.Enums;
+
+namespace CMSMicroservice.Domain.Entities.Payment;
+
+/// <summary>
+/// پرداخت دستی توسط Admin/SuperAdmin
+/// برای موارد خاص: واریز نقدی، تسویه حساب، اصلاح خطا
+/// </summary>
+public class ManualPayment : BaseAuditableEntity
+{
+    /// <summary>
+    /// شناسه کاربری که پرداخت برای او ثبت می‌شود
+    /// </summary>
+    public long UserId { get; set; }
+
+    /// <summary>
+    /// User Navigation Property
+    /// </summary>
+    public virtual User User { get; set; } = null!;
+
+    /// <summary>
+    /// مبلغ تراکنش (ریال)
+    /// </summary>
+    public long Amount { get; set; }
+
+    /// <summary>
+    /// نوع تراکنش دستی
+    /// </summary>
+    public ManualPaymentType Type { get; set; }
+
+    /// <summary>
+    /// توضیحات (اجباری)
+    /// </summary>
+    public string Description { get; set; } = string.Empty;
+
+    /// <summary>
+    /// شماره مرجع یا شماره فیش (اختیاری)
+    /// </summary>
+    public string? ReferenceNumber { get; set; }
+
+    /// <summary>
+    /// وضعیت تایید
+    /// </summary>
+    public ManualPaymentStatus Status { get; set; } = ManualPaymentStatus.Pending;
+
+    /// <summary>
+    /// شناسه Admin که درخواست را ثبت کرده
+    /// </summary>
+    public long RequestedBy { get; set; }
+
+    /// <summary>
+    /// شناسه SuperAdmin که تایید/رد کرده (nullable)
+    /// </summary>
+    public long? ApprovedBy { get; set; }
+
+    /// <summary>
+    /// تاریخ تایید/رد
+    /// </summary>
+    public DateTime? ApprovedAt { get; set; }
+
+    /// <summary>
+    /// دلیل رد (در صورت رد شدن)
+    /// </summary>
+    public string? RejectionReason { get; set; }
+
+    /// <summary>
+    /// شناسه تراکنش ایجاد شده (بعد از تایید)
+    /// </summary>
+    public long? TransactionId { get; set; }
+
+    /// <summary>
+    /// Transaction Navigation Property
+    /// </summary>
+    public virtual Transaction? Transaction { get; set; }
+}