DTOs for index mostly done, doing DB models

SVSim.Database/Models/ClassEntry.cs

@@ -0,0 +1,12 @@
+using System.ComponentModel.DataAnnotations.Schema;
+using DCGEngine.Database.Models;
+
+namespace SVSim.Database.Models;
+
+public class ClassEntry : BaseEntity<int>
+{
+    /// <summary>
+    /// The name of the class.
+    /// </summary>
+    public string Name { get; set; } = string.Empty;
+}