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/Category.cs

@@ -19,7 +19,7 @@ public class Category : BaseAuditableEntity
     //ترتیب نمایش
     public int SortOrder { get; set; }
     //Category Collection Navigation Reference
-    public virtual ICollection<Category> Categorys { get; set; }
-    //PruductCategory Collection Navigation Reference
-    public virtual ICollection<PruductCategory> PruductCategorys { get; set; }
+    public virtual ICollection<Category> Categories { get; set; }
+    //ProductCategory Collection Navigation Reference
+    public virtual ICollection<ProductCategory> ProductCategories { get; set; }
 }