Abstract base for new domain

dotnet/AipsCore/Domain/Abstract/DomainEntity.cs

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+using AipsCore.Domain.Common.ValueObjects;
+
+namespace AipsCore.Domain.Abstract;
+
+public abstract class DomainEntity<TId> where TId : DomainId
+{
+    private readonly List<IDomainEvent> _domainEvents = [];
+    
+    public TId Id { get; init; }
+    
+    protected DomainEntity()
+    {
+        
+    }
+
+    protected DomainEntity(TId id)
+    {
+        Id = id;
+    }
+
+    public IReadOnlyList<IDomainEvent> GetDomainEvents() => _domainEvents.ToList();
+    
+    public void ClearDomainEvents() => _domainEvents.Clear();
+    
+    protected void RaiseDomainEvent(IDomainEvent domainEvent) => _domainEvents.Add(domainEvent);
+}

dotnet/AipsCore/Domain/Abstract/IAbstractRepository.cs

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+using AipsCore.Domain.Common.ValueObjects;
+
+namespace AipsCore.Domain.Abstract;
+
+public interface IAbstractRepository<TEntity, in TId>
+    where TEntity : DomainEntity<TId>
+    where TId : DomainId
+{
+    Task<TEntity?> GetByIdAsync(TId id, CancellationToken cancellationToken = default);
+    Task SaveAsync(TEntity entity, CancellationToken cancellationToken = default);
+    Task AddAsync(TEntity entity, CancellationToken cancellationToken = default);
+}

dotnet/AipsCore/Domain/Abstract/IDomainEvent.cs

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+namespace AipsCore.Domain.Abstract;
+
+public interface IDomainEvent
+{
+    
+}