更改类型为别名并支持可空类型

将代码中的内置类型更改为对应的别名类型（如 `bool` 改为 `Boolean`，`string` 改为 `String` 等）。此外，将某些属性类型改为可空类型（如 `String?`, `Object?`, `T?`），以允许这些属性可以为 `null`。

Pek.AspNetCore/Models/DResult.cs

@@ -2,35 +2,35 @@
 
 public class DResult
 {
-    public bool success { get; set; }
+    public Boolean success { get; set; }
 
-    public string msg { get; set; }
+    public String? msg { get; set; }
 
     /// <summary>
     /// 状态
     /// <para>1表成功</para>
     /// </summary>
-    public int status { get; set; }
+    public Int32 status { get; set; }
 
     /// <summary>
     /// 数据
     /// </summary>
-    public object data { get; set; }
+    public Object? data { get; set; }
 
     /// <summary>
     /// 附加数据
     /// </summary>
-    public object extdata { get; set; }
+    public Object? extdata { get; set; }
 
-    public int code { get; set; }
+    public Int32 code { get; set; }
 
     /// <summary>
     /// 网址路径
     /// </summary>
-    public string locate { get; set; }
+    public String? locate { get; set; }
 }
 
 public class DResult<T> : DResult
 {
-    public T TData { get; set; }
+    public T? TData { get; set; }
 }