Refactor repository pattern and mark methods obsolete

Updated `IRepository<TEntity>` to introduce new reading methods and mark existing ones as obsolete. The `CRUDRepository` class is now deprecated, encouraging a transition to alternative implementations. Significant changes in `DbRepository<TDbContext, TEntity>` include the removal of old read methods in favor of a new `Read` method returning `IReadQuery<TEntity>`. Added a `ReadQuery<TEntity>` class to enhance querying capabilities with a fluent API. Obsolete methods are organized under a `#region Obsolete` directive for better management.

DigitalData.Core.Application/Interfaces/Repository/IRepository.cs

@@ -16,6 +16,7 @@ public interface IRepository<TEntity>
 
     public Task DeleteAsync(Expression<Func<TEntity, bool>> expression, CancellationToken cancellation = default);
 
+    #region Obsolete
     [Obsolete("Use Read-method returning IReadQuery<TEntity> instead.")]
     public Task<IEnumerable<TEntity>> ReadAllAsync(Expression<Func<TEntity, bool>>? expression = null, CancellationToken cancellation = default);
 
@@ -27,4 +28,5 @@ public interface IRepository<TEntity>
 
     [Obsolete("Use Read-method returning IReadQuery<TEntity> instead.")]
     public Task<TDto?> ReadOrDefaultAsync<TDto>(Expression<Func<TEntity, bool>> expression, bool single = true, CancellationToken cancellation = default);
+    #endregion
 }