Refactor namespaces and enhance application structure

This commit reorganizes namespaces from `DigitalData.Core.Abstractions` and `DigitalData.Core.DTO` to `DigitalData.Core.Application.Interfaces` and `DigitalData.Core.Application.DTO`, improving maintainability and clarity.

Updated using directives across multiple files to reflect the new structure, ensuring functionality remains intact.

Project references in `DigitalData.Core.API.csproj` have been consolidated to include the new Application project.

Introduced new classes and interfaces such as `BaseDTO`, `CookieConsentSettings`, `DataResult`, `Notice`, and `Result` to enhance data transfer and service result handling.

Updated `IRepository`, `ICRUDRepository`, and `IEntityMapper` interfaces to facilitate CRUD operations and entity mapping.

Added extension methods in `Extensions.cs` to improve repository usability.

New interfaces for HTTP client services have been added, enhancing external API call handling.

Overall, these changes reflect a significant restructuring aimed at improving organization and preparing for future development.

DigitalData.Core.Application/Interfaces/IBasicCRUDService.cs

@@ -0,0 +1,22 @@
+using DigitalData.Core.Abstractions;
+
+namespace DigitalData.Core.Application.Interfaces
+{
+    /// <summary>
+    /// Implements a simplified CRUD service interface that uses a single Data Transfer Object (DTO) type for all CRUD operations,
+    /// streamlining the process for entities where the same DTO can be used for creating, reading, updating, and deleting entities.
+    /// This interface inherits from the ICRUDService interface, applying the same DTO type for all generic type parameters,
+    /// thereby simplifying the usage for cases where a single DTO is sufficient for all operations on an entity.
+    /// </summary>
+    /// <typeparam name="TDto">The type of the Data Transfer Object used for all CRUD operations.</typeparam>
+    /// <typeparam name="TEntity">The type of the entity this service maps to.</typeparam>
+    /// <typeparam name="TId">The type of the identifier for the entity.</typeparam>
+    /// <remarks>
+    /// This interface is useful for entities that do not require different DTOs for different operations,
+    /// allowing for a more concise and maintainable codebase when implementing services for such entities.
+    /// </remarks>
+    public interface IBasicCRUDService<TDto, TEntity, TId> : ICRUDService<TDto, TDto, TEntity, TId>
+        where TDto : class, IUnique<TId> where TEntity : class, IUnique<TId>
+    {
+    }
+}