Lots of data and model setup

SVSim.Database/Models/OwnedCardEntry.cs

@@ -0,0 +1,15 @@
+using DCGEngine.Database.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace SVSim.Database.Models;
+
+/// <summary>
+/// Represents viewer ownership of a <see cref="ShadowverseCardEntry"/>.
+/// </summary>
+[Owned]
+public class OwnedCardEntry
+{
+    public CardEntry Card { get; set; } = new ShadowverseCardEntry();
+    public int Count { get; set; }
+    public bool IsProtected { get; set; }
+}