Starting on the Data portion

SessionZero/Data/Dataset.cs

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+namespace SessionZero.Data;
+
+public class Dataset
+{
+    
+}

SessionZero/Data/DatasetObject.cs

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+namespace SessionZero.Data;
+
+public class DatasetObject
+{
+    
+}

SessionZero/Data/DatasetObjectTemplate.cs

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+namespace SessionZero.Data;
+
+public class DatasetObjectTemplate
+{
+    
+}

SessionZero/Data/Sztl/SztlField.cs

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+using System;
+
+namespace SessionZero.Data.Sztl;
+
+public class SztlField
+{
+    public required string Id { get; set; }
+    public required SztlFieldType FieldType { get; set; }
+}
+
+public enum SztlFieldType
+{
+    Number, Text, Textbox, Bool, Object, Formula
+}