add VatNumber Nox.Type Placeholder

src/Nox.Types/Enums/NoxType.cs

@@ -6,6 +6,8 @@ public enum NoxType
     @Array,
     @Collection,
     @Object,
+    // This is complex, needs to include CountryCode 
+    VatNumber, 
 
     // Compound Types - requires multiple fields to persist
     [CompoundType] Entity,

src/Nox.Types/Types/VatNumber/VatNumber.cs

@@ -0,0 +1,9 @@
+namespace Nox.Types;
+
+    /// <summary>
+    /// Represents a Nox <see cref="VatNumber"/> type and value object.
+    /// </summary>
+    /// <remarks>Placeholder, needs to be implemented</remarks>
+    public sealed class VatNumber : ValueObject<(string VatNumber, CountryCode2 countryCode2), VatNumber>
+    {
+    }

tests/Nox.Types.Tests/Types/VatNumberTests/VatNumberTests.cs

@@ -0,0 +1,11 @@
+// ReSharper disable once CheckNamespace
+namespace Nox.Types.Tests.Types;
+
+public class VatNumberTests
+{
+    [Fact]
+    public void When_Create_Should()
+    {
+
+    }
+}