Add initial hcs database schema creation

Hcs.WebApp/Data/Hcs/RegistryElement.cs

@@ -0,0 +1,17 @@
+namespace Hcs.WebApp.Data.Hcs
+{
+    public class RegistryElement
+    {
+        public string Id { get; set; }
+
+        public string RegistryId { get; set; }
+
+        public virtual Registry Registry { get; set; } = null!;
+
+        public string Code { get; set; }
+
+        public string GUID { get; set; }
+
+        public virtual string Xml { get; set; }
+    }
+}