functional card/row edit and drag

Serialization/SerialRow.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Godot;
+
+public class SerialRow
+{
+    [JsonInclude]
+    public string Text { get; set; }
+    [JsonInclude]
+    public SerialColor Color { get; set; }
+    [JsonInclude]
+    public SerialCard[] Cards { get; set; }
+    public row ToRow(SceneTree tree)
+    {
+        var r = row.MakeRow(tree);
+        r.RowText = Text;
+        r.RowColor = Color;
+        foreach (var c in Cards)
+            r.AddCard(c.ToCard(tree));
+        return r;
+    }
+}
+