Deprecate methods and classes in UserManager.Application

Introduce `[Obsolete]` attributes to various methods and classes, suggesting alternatives such as MediatR and IRepository. Mark multiple DTOs and repository classes as obsolete, recommending the use of DigitalData.Core.Exceptions and .Middleware or Repository. This change aims to enhance maintainability and clarity in the codebase.

DigitalData.UserManager.Application/DIExtensions.cs

@@ -16,6 +16,7 @@ namespace DigitalData.UserManager.Application
         /// <typeparam name="TDbContext">The type of the DbContext to use for the repositories.</typeparam>
         /// <param name="services">The IServiceCollection to which the services will be added.</param>
         /// <returns>The updated IServiceCollection.</returns>
+        [Obsolete("Use MediatR")]
         public static IServiceCollection AddUserManagerApplication(this IServiceCollection services)
             => services
             .AddAutoMapper(typeof(UserMappingProfile).Assembly)

DigitalData.UserManager.Application/DTOs/Group/GroupReadDto.cs

@@ -2,6 +2,7 @@
 
 namespace DigitalData.UserManager.Application.DTOs.Group
 {
+    [Obsolete("Use DigitalData.Core.Exceptions and .Middleware")]
     public record GroupReadDto
     (
         int Id,

DigitalData.UserManager.Application/DTOs/GroupOfUser/GroupOfUserReadDto.cs

@@ -4,6 +4,7 @@ using DigitalData.UserManager.Application.DTOs.User;
 
 namespace DigitalData.UserManager.Application.DTOs.GroupOfUser
 {
+    [Obsolete("Use DigitalData.Core.Exceptions and .Middleware")]
     public record GroupOfUserReadDto(
         int Id,
         int UserId,

DigitalData.UserManager.Application/DTOs/UserRep/UserRepReadDto.cs

@@ -4,6 +4,7 @@ using DigitalData.UserManager.Application.DTOs.User;
 
 namespace DigitalData.UserManager.Application.DTOs.UserRep
 {
+    [Obsolete("Use DigitalData.Core.Exceptions and .Middleware")]
     public record UserRepReadDto(
         int Id,
         int? UserId,