chore: 初始化项目基础文件

src/Core/TakeoutSaaS.Shared.Abstractions/Entities/IAuditableEntity.cs

@@ -0,0 +1,11 @@
+namespace TakeoutSaaS.Shared.Abstractions.Entities;
+
+/// <summary>
+/// 审计字段接口
+/// </summary>
+public interface IAuditableEntity
+{
+    DateTime CreatedAt { get; set; }
+    DateTime? UpdatedAt { get; set; }
+}
+