Deprecate repositories and update service interfaces

- Marked `IEnvelopeReceiverRepository` and several repository classes as obsolete, recommending the use of `IRepository`.
- Corrected `using` directive in `IReceiverService.cs`.
- Removed `UpdateAsync` method from `IReceiverService`.
- Enhanced `ISmsSender` interface with new properties and methods.
- Updated `ReceiverCreateDto`, `ReceiverReadDto`, and `UserReceiverDto` to enforce non-nullable properties.
- Refactored `TestReceiverController` to suggest using `MediatR`.

EnvelopeGenerator.Infrastructure/Repositories/ConfigRepository.cs

@@ -5,6 +5,7 @@ using Microsoft.EntityFrameworkCore;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories;
 
+[Obsolete("Use IRepository")]
 public class ConfigRepository : CRUDRepository<Config, int, EGDbContext>, IConfigRepository
 {
     public ConfigRepository(EGDbContext dbContext) : base(dbContext, dbContext.Configs)

EnvelopeGenerator.Infrastructure/Repositories/DocumentReceiverElementRepository.cs

@@ -4,6 +4,7 @@ using EnvelopeGenerator.Application.Contracts.Repositories;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories;
 
+[Obsolete("Use IRepository")]
 public class DocumentReceiverElementRepository : CRUDRepository<DocumentReceiverElement, int, EGDbContext>, IDocumentReceiverElementRepository
 {
     public DocumentReceiverElementRepository(EGDbContext dbContext) : base(dbContext, dbContext.DocumentReceiverElements)

EnvelopeGenerator.Infrastructure/Repositories/DocumentStatusRepository.cs

@@ -1,10 +1,10 @@
 using DigitalData.Core.Infrastructure;
-using DigitalData.UserManager.Infrastructure.Repositories;
 using EnvelopeGenerator.Domain.Entities;
 using EnvelopeGenerator.Application.Contracts.Repositories;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories;
 
+[Obsolete("Use IRepository")]
 public class DocumentStatusRepository : CRUDRepository<DocumentStatus, int, EGDbContext>, IDocumentStatusRepository
 {
     public DocumentStatusRepository(EGDbContext dbContext) : base(dbContext, dbContext.DocumentStatus)

EnvelopeGenerator.Infrastructure/Repositories/EnvelopeCertificateRepository.cs

@@ -4,6 +4,7 @@ using EnvelopeGenerator.Application.Contracts.Repositories;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories;
 
+[Obsolete("Use IRepository")]
 public class EnvelopeCertificateRepository : CRUDRepository<EnvelopeCertificate, int, EGDbContext>, IEnvelopeCertificateRepository
 {
     public EnvelopeCertificateRepository(EGDbContext dbContext) : base(dbContext, dbContext.EnvelopeCertificates)

EnvelopeGenerator.Infrastructure/Repositories/EnvelopeDocumentRepository.cs

@@ -4,6 +4,7 @@ using EnvelopeGenerator.Application.Contracts.Repositories;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories;
 
+[Obsolete("Use IRepository")]
 public class EnvelopeDocumentRepository : CRUDRepository<EnvelopeDocument, int, EGDbContext>, IEnvelopeDocumentRepository
 {
     public EnvelopeDocumentRepository(EGDbContext dbContext) : base(dbContext, dbContext.EnvelopeDocument)

EnvelopeGenerator.Infrastructure/Repositories/EnvelopeReceiverReadOnlyRepository.cs

@@ -5,6 +5,7 @@ using Microsoft.EntityFrameworkCore;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories;
 
+[Obsolete("Use IRepository")]
 public class EnvelopeReceiverReadOnlyRepository : CRUDRepository<EnvelopeReceiverReadOnly, long, EGDbContext>, IEnvelopeReceiverReadOnlyRepository
 {
     private readonly IEnvelopeRepository _envRepo;

EnvelopeGenerator.Infrastructure/Repositories/EnvelopeRepository.cs

@@ -5,6 +5,7 @@ using Microsoft.EntityFrameworkCore;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories;
 
+[Obsolete("Use IRepository")]
 public class EnvelopeRepository : CRUDRepository<Envelope, int, EGDbContext>, IEnvelopeRepository
 {
     public EnvelopeRepository(EGDbContext dbContext) : base(dbContext, dbContext.Envelopes)

EnvelopeGenerator.Infrastructure/Repositories/EnvelopeTypeRepository.cs

@@ -4,6 +4,7 @@ using EnvelopeGenerator.Application.Contracts.Repositories;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories;
 
+[Obsolete("Use IRepository")]
 public class EnvelopeTypeRepository : CRUDRepository<EnvelopeType, int, EGDbContext>, IEnvelopeTypeRepository
 {
     public EnvelopeTypeRepository(EGDbContext dbContext) : base(dbContext, dbContext.EnvelopeTypes)

EnvelopeGenerator.Infrastructure/Repositories/ReceiverRepository.cs

@@ -5,6 +5,7 @@ using Microsoft.EntityFrameworkCore;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories;
 
+[Obsolete("Use IRepository")]
 public class ReceiverRepository : CRUDRepository<Receiver, int, EGDbContext>, IReceiverRepository
 {
     public ReceiverRepository(EGDbContext dbContext) : base(dbContext, dbContext.Receivers)

EnvelopeGenerator.Infrastructure/Repositories/UserReceiverRepository.cs

@@ -4,6 +4,7 @@ using EnvelopeGenerator.Application.Contracts.Repositories;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories;
 
+[Obsolete("Use IRepository")]
 public class UserReceiverRepository : CRUDRepository<UserReceiver, int, EGDbContext>, IUserReceiverRepository
 {
     public UserReceiverRepository(EGDbContext dbContext) : base(dbContext, dbContext.UserReceivers)