重构项目结构，移除Assignment相关功能，优化Submission模块

Entities/DTO/Authentication/ResetPasswordDto.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.DTO
+{
+	public class ResetPasswordDto
+	{
+		[Required(ErrorMessage = "Password is required")]
+		public string Password { get; set; }
+
+		[Compare(nameof(Password), ErrorMessage = "The password and confirmation password do not match")]
+		public string ConfirmPassword {  get; set; }
+
+		public string Email { get; set; }
+
+		public string Token { get; set; }
+	}
+}